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EXPRESS5800 3UDEU ()
Disk Expansion Unit Service Guide
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EXPRESS5800 3UDEU
()
Disk Expansion Unit Service Guide
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Proprietary Notice and Liability Disclaimer The information disclosed in this document, including all designs and related materials, is the valuable property of NEC Computers Inc. and/or its licensors. NEC Computers Inc. and/or its licensors, as appropriate, reserve all patent, copyright and other proprietary rights to this document, including all design, manufacturing, reproduction, use, and sales rights thereto, except to the extent said rights are expressly granted to others. The NEC Computers Inc. product(s) discussed in this document are warranted in accordance with the terms of the Warranty Statement accompanying each product. However, actual performance of each such product is dependent upon factors such as system configuration, customer data, and operator control. Since implementation by customers of each product may vary, the suitability of specific product configurations and applications must be determined by the customer and is not warranted by NEC Computers Inc. To allow for design and specification improvements, the information in this document is subject to change at any time, without notice. Reproduction of this document or portions thereof without prior written approval of NEC Computers Inc. is prohibited.
Trademarks All product, brand, or trade names used in this publication are the trademarks or registered trademarks of their respective trademark owners.
PN: 456-01545-000
May 2000
Copyright 2000 NEC Computers Inc. 15 Business Park Way Sacramento, CA 95828 All Rights Reserved
Contents Using This Guide ................................................................... v Text Conventions ................................................................................................................. vi Safety Notices ..................................................................................................................... vii Safety Notices for Users Outside of the U.S.A. and Canada ......................................... vii Care and Handling ............................................................................................................. viii
DEU Overview .....................................................................1-1 Overview............................................................................................................................ 1-2 SCSI Disk Drive Bays........................................................................................................ 1-3 SAF-TE Board ................................................................................................................... 1-4 High Capacity Cooling Fans .............................................................................................. 1-4 Power Supplies................................................................................................................... 1-4 I/O Panel Connectors ......................................................................................................... 1-4 Security .............................................................................................................................. 1-5 LED Indicators................................................................................................................... 1-5 Front Panel LED Indicators .......................................................................................... 1-6 Disk Drive Status Indicator LEDs ................................................................................ 1-6 Rear Panel LED Indicators ........................................................................................... 1-7 Chassis Features................................................................................................................. 1-8 Rear Panel Features............................................................................................................ 1-9
Setting Up The DEU ............................................................2-1 Overview............................................................................................................................ 2-2 Selecting a Site................................................................................................................... 2-2 Unpacking the DEU and Rack Mounting Hardware.......................................................... 2-3 Rack-Mount Subsystem Assembly .................................................................................... 2-4 Before You Begin ......................................................................................................... 2-4 Static Precautions.......................................................................................................... 2-4 Replacing the DEU Rack-mounting Brackets .............................................................. 2-5 Preparing the Mounting Brackets and Rail Assemblies................................................ 2-6 Attaching the Mounting Bracket Assembly to the Rack............................................... 2-8 Installing the DEU into the System Rack ..................................................................... 2-9 Cabling Connections ........................................................................................................ 2-10 Termination................................................................................................................. 2-10 Cabling Configurations............................................................................................... 2-10 Connecting the Power Cord(s) ......................................................................................... 2-12 Powering On/Off.............................................................................................................. 2-13
Assembly and Disassembly...............................................3-1 Static Precautions............................................................................................................... 3-2 Preparing Your DEU for Upgrade ..................................................................................... 3-3 Removing the DEU from the Rack .................................................................................... 3-4 Hard Disk Drives ............................................................................................................... 3-5 SCSI ID Assignment..................................................................................................... 3-5 Installing or Swapping a Hard Disk Drive in a Hot-swap Bay..................................... 3-6 Installing or Swapping a Hard Disk Drive.................................................................... 3-7 Power Supply ................................................................................................................... 3-10 Contents iii
Installing the Optional Power Supply .........................................................................3-10 Replacing a Power Supply ..........................................................................................3-11 Replacing a Fan ................................................................................................................3-12 Removing and Replacing the Top Cover ........................................................................3-14 Adding the Two-Channel SCSI Board .............................................................................3-15 Removing and Replacing the Power and GEM Board .....................................................3-18 Removing the Power and GEM Board........................................................................3-18 Replacing the Power and GEM Board ........................................................................3-20 Removing and Replacing the SCSI Backplane ................................................................3-22 Removing the SCSI Backplane ...................................................................................3-22 Replacing the SCSI Backplane ...................................................................................3-22 Removing and Replacing the Fan LED Cable Assembly.................................................3-23 Removing the Fan LED Cable Assembly ...................................................................3-24 Installing the DEU into the System Rack.........................................................................3-26
Problem Solving ................................................................. 4-1 Introduction ........................................................................................................................4-2 Static Precautions ...............................................................................................................4-2 Initial DEU Startup .......................................................................................................4-2 Troubleshooting Table .......................................................................................................4-3
Illustrated Parts Breakdown .............................................. 5-1 Exploded View ...................................................................................................................5-3 Field Replaceable Units......................................................................................................5-4 Cable List ...........................................................................................................................5-4 Hard Disk Drives................................................................................................................5-5 Upgrades .......................................................................................................................5-5 Replaceable Parts ..........................................................................................................5-5
Specifications .................................................................... A-1 Specifications .................................................................................................................... A-2
Glossary Index
iv Contents
Using This Guide Welcome to the 3UDEU Service Guide. This service guide includes all the information found in the EXPRESS5800 3UDEU User’s Guide and includes disassembly and reassembly instructions for all field replaceable units (FRUs). This service guide also contains 3UDEU specifications, and a complete parts list, including an exploded view of the 3UDEU. If you have any comments regarding this service reference or if you think something needs to be changed, please contact us. Limit your comments to issues concerning the documentation only, and indicate which service reference you are referring to. For all other service related issues, use your normal feedback channels. This guide contains the following information: !
Chapter 1, “DEU Overview” provides an overview of your DEU and describes its major system components. See this chapter to familiarize yourself with your DEU.
!
Chapter 2, “Setting Up Your DEU” tells you how to select a site, unpack the DEU, assemble the rack-mount subsystem, install the DEU into a system rack, connect the power cord(s), and power on the DEU. DEU to host configurations are also described
!
Chapter 3, “Disassembly and Reassembly” provides you with instructions for removing and replacing all Field Replaceable Units (FRUs) in your 3UDEU.
!
Chapter 4, “Problem Solving” contains helpful information for solving problems that might occur with your DEU.
!
Chapter 5, “Illustrated Parts Breakdown” contains the exploded view and parts lists for the server's major assemblies. Part numbers are also provided for optional hardware.
!
Appendix A, “Specifications” provides physical, electrical and environmental specifications for the 3UDEU and optional two-channel SCSI option board.
!
“Glossary” defines the standard acronyms and technical terms associated with the DEU.
Using This Guide v
Text Conventions This guide uses the following text conventions. Warnings, cautions, and notes have the following meanings:
! WARNING Warnings alert you to situations that could result in serious personal injury or loss of life.
! CAUTION Cautions indicate situations that can damage the system hardware or software.
Note: Notes give important information about the material being described. !
Names of keyboard keys are printed as they appear on the keyboard. For example, Ctrl, Alt, or Enter.
!
Text or keystrokes that you enter appear as boldface type. For example, type abc123 and press ENTER.
!
File names are printed in uppercase letters. For example, AUTOEXEC.BAT.
vi Using This Guide
Safety Notices ! !
Caution: To reduce the risk of electric shock which could cause personal injury, follow all safety notices. The symbols shown are used in your documentation and on your equipment to indicate safety hazards.
!
Warning: The detachable power supply cords are intended to serve as the disconnect devices.
!
Warning: This equipment has a 3-wire, grounded power cords. To prevent electrical hazards, do not remove or defeat the ground prong on the power cords. Replace a power cord if it gets damaged. Contact your dealer for an exact replacement.
In the U.S.A. and Canada, the power cord must be a UL-listed detachable power cord (in Canada, CSA-certified), type ST or SJT, 16 AWG, 3-conductor, provided with a molded-on NEMA type 5-15 P plug cap at one end and a molded-on cord connector body at the other end. The cord length must not exceed 9 feet (2.7 meters). Outside the U.S.A. and Canada, the plug must be rated for 250 VAC, 10 amp minimum, and must display an international agency approval marking. The cord must be suitable for use in the end-user country. Consult your dealer or the local electrical authorities if you are unsure of the type of power cord to use in your country. The voltage change occurs via a switch in the power supply. !
Warning: Under no circumstances should the user attempt to disassemble the power supply. The power supply has no user-replaceable parts. Inside the power supply are hazardous voltages that can cause serious personal injury. A defective power supply must be returned to your dealer.
Safety Notices for Users Outside of the U.S.A. and Canada !
PELV (Protected Extra-Low Voltage) Integrity: To ensure the extra-low voltage integrity of the equipment, connect only equipment with mains-protected electricallycompatible circuits to the external ports.
!
Remote Earths: To prevent electrical shock, connect all local (individual office) computers and computer support equipment to the same electrical circuit of the building wiring. If you are unsure, check the building wiring to avoid remote earth conditions.
!
Earth Bonding: For safe operation, only connect the equipment to a building supply that is in accordance with current wiring regulations in your country. In the U.K., those regulations are the IEE.
Using This Guide vii
Care and Handling Use the following guidelines to properly handle and care for your system. Protect the system from extremely low or high temperatures. Let the system warm (or cool) to room temperature before using it.
Keep the system away from magnetic forces.
Keep the system dry. Do not wash the system with a wet cloth or pour fluid into it.
Protect the system from being bumped or dropped.
Check the system for condensation. If condensation exists, allow it to evaporate before powering on the system.
Keep the system away from dust, sand, and dirt.
viii Using This Guide
1 DEU Overview !
Overview
!
SCSI Disk Drive Bays
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SAF-TE Board
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High Capacity Cooling Fans
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Power Supplies
!
I/O Panel Connectors
!
Security
!
LED Indicators
!
Chassis Features
!
Rear Panel Features
Overview The 3UDEU Disk Expansion Unit (DEU) provides fault-tolerant storage in a subsystem-based SAF-TE compliant RAID enclosure. See Figure 1-1. The 3UDEU is referred to as the DEU within this guide. The SAF-TE compliant interface provides a standard, non-proprietary means for the RAID subsystem to support status signals, hot swapping drives and enclosure monitoring. Combined with the Redundant Array of Independent Disks (RAID) management software, additional levels of fault tolerance can be maintained. The DEU includes an eight hard disk drive enclosure designed to support a host systembased architecture. The architecture includes a single or dual channel SCSI backplane supporting up to eight Ultra160/m SCSI hard disk drives in the single channel configuration and four drives on each channel in the dual channel configuration. The DEU is available as a rack-mount system and fits into a standard EIA 19-inch rack assembly. The DEU may also be installed into specific Express5800 Server models.
Figure 1-1. Rack-Mount DEU Front View
The DEU features the following major components: !
Easy cabling to one or more host bus adapters.
!
Hot-swap SCSI hard disk drive bays accessible from the front of the chassis. The drives can be swapped in or out of the DEU without powering it down, if a RAID controller is used. The bays support up to eight 1.6” drives. Disk drives are high performance hot-swappable 7,200 and 10,000 RPM Ultra160/m SCSI hard disk drives. Drive capacities range from 9GB to 36GB.
!
Hardware monitors (temperature, fans, and voltage) and software monitors to indicate failures.
!
LEDs provide failure notifications.
1-2 DEU Overview
!
Remote Start control of disk drive spin up.
!
Complete support of SAF-TE v1.0 standards (SCSI-Accessed Fault-Tolerant Enclosure) protocol.
!
Automatic SCSI bus termination.
The DEU system is designed for minimum downtime. Thus, the DEU contains the following: !
Up to two power supplies for power system redundancy. With two power supplies, the DEU will continue to operate with a single power supply failure. The selfcontained power supply units can be easily and safely hot-swapped from the rear of the chassis.
!
SCSI disk drive bays accessible from the front of the chassis.
!
Hot-swap SCSI disk drive backplane, supporting eight drives. A failed drive can be removed and a new drive installed without system power being turned off, if an optional (RAID) controller is used.
!
High degree of SCSI disk fault tolerance and advanced disk array management features through the use of RAID technology.
!
Four high capacity hot-swappable cooling fans. With four cooling fans, the DEU will be adequately cooled even if one of the fans fails.
SCSI Disk Drive Bays The DEU supports a variety of standard SCA-2 hard disk drives. The chassis includes eight hot-swappable SCSI hard disk drive bays for mounting up to eight SCA-2 hard disk drives in easily removable drive carriers. Each bay accommodates either 1.0" or 1.6" drives. Note: The DEU contains a hot-swap backplane that requires an 80-pin single connector attachment (SCA-2) connector on the drives that you install. The design of the drive mounting uses a carrier rail system making it possible to "hot swap" a drive without shutting down the DEU, provided a RAID controller is installed in the host server. Note: All drives in a RAID array should be of the same capacity. If the drives are mixed, all of the drives in the array are assigned the capacity of the smallest size drive.
DEU Overview 1-3
SAF-TE Board The DEU has a SAF-TE (SCSI-Accessed Fault-Tolerant Enclosure) controller that provides an interface to the disk subsystem that supports status signals, hot swapping drives, and enclosure monitoring. The transport mechanism for the standardized alert detection and status reporting is the SCSI bus. Disk drives, power supplies, and cooling fans, are continually monitored and the conditions then reported over the SCSI bus to the host system. When used with RAID management software the user can be alerted of impending or imminent conditions requiring attention. This allows the user to react to conditions that could normally go unnoticed until data loss.
High Capacity Cooling Fans The DEU contains two hot-swappable cooling fan assemblies as part of a fault-tolerant, hot-swap design. Each fan assembly contains two high capacity cooling fans. With a total of four cooling fans, the DEU will be adequately cooled even if one of the fans fails. Also, should any of the fans fail, they may be replaced without powering down the DEU. The fans draw air across the hard disk drives and electronics of the system and exhaust out through the rear panel.
Power Supplies The DEU contains one auto-sensing 340 watt power supply at an operating frequency of 50/60 Hz. A second optional power supply may be added as part of a fault-tolerant hot-swap design. With two power supplies installed, in the event of a power supply failure, the load is transferred to the remaining power supply without interruption to normal operation. Note: The power supplies are not hot swappable unless there are two supplies installed. The power supplies are designed to comply with existing emission standards and provide sufficient power for a fully loaded system configuration.
I/O Panel Connectors The rear panel of the DEU may include up to two wide Ultra160/m SCSI bus connectors. In the standard single channel configuration, only one of the SCSI bus connectors is present to connect the DEU to the Disk Array Controller in your server. If the optional two-channel SCSI board is installed in the DEU, the DEU provides a twochannel SCSI interface, in which case both SCSI bus connectors are cabled to the Disk Array Controller in your server.
1-4 DEU Overview
Security Locks may be installed in lock loops located at the rear of the DEU to prevent unauthorized removal of the DEU power supplies. Rack-mounted DEUs are also secured in the system cabinet by locking mechanisms installed on the system rack front and rear doors.
LED Indicators The DEU contains several indicator LEDs located on the front and rear of the unit to assist in determining the current state of the subsystem. Figure 1-2 shows the LEDs located on the front of the DEU. Subsections following this illustration describe the function of these LED indicators in detail. A B C D F
G
H
E
A.
DC Power ON/OFF LED
When green, power is present in system. When off, power is turned off or power source is disrupted.
B.
LVD Mode LED
When green, the DEU is operating in LVD transfer mode (Ultra2 or Ultra160/m).
C.
Two-channel LED
When Off, all hard disks are configured in one channel; When green, the hard disks are configured in two channels.
D.
Power Supply Fault LED
When amber, a power supply has failed. A green LED on the failed power supply will be OFF.
E.
Fan Fault LED
When amber one of the four fans has failed. Four amber indicators located on the rear panel indicate which fan has failed. Refer to the Rear Panel Indicators section.
F.
Drive Present LED
When green, the hard drive is present and powered up.
G.
Drive Activity LED
When green, the hard drive is being accessed.
H.
Drive Status LED
When lit amber the hard drive has failed; when flashing amber, the disk is rebuilding.
Figure 1-2. DEU LED Indicators DEU Overview 1-5
Front Panel LED Indicators DC Power The Power-On LED (Figure 1-2,A) indicates if power has been applied to the DEU. The LED illuminates steady green to signify that the DEU system has power applied. Power is controlled from the host server. LVD SCSI LED The LVD SCSI LED (Figure 1-2, B) indicates the negotiated transfer rate of the hard disk drives in the DEU. When green, the internal disk drives are using LVD SCSI transfer modes (Ultra2 or Ultra160/m). Mode The Mode LED (Figure 1-2, C) indicates the configuration of the hard disk drives in the DEU. The LED will be OFF when the DEU is configured for single-channel operation and will be lit green to indicate the DEU is configured for dual-channel operation. An optional board is required in the DEU for the dual channel configuration. Power Failure The Power Supply Status LED (Figure 1-2, D) indicates the condition of the system power supplies. The LED will be OFF when the power supplies are functioning normally and will change to amber if one of the power supplies should fail. This condition will only be indicated if a RAID controller is present or if system management software (ESMPRO) is running on the host. The Power-On LED on the rear of the power supply turns off indicating a defective supply. Fan Failure The Fan Status LED (Figure 1-2, E) indicates the condition of the four cooling fans located in the DEU behind the SCSI backplane. The LED will be OFF when all of the fans are functioning normally and will change to amber if any of the fans fail. This condition will only be indicated if a RAID controller is present or if system management software (ESMPRO) is running on the host.
Disk Drive Status Indicator LEDs Disk Drive Status indicator LEDs for each disk drive are provided to aid in showing a specific drive's activity and in identifying the failed (or problem) disk drive. These LEDs are aligned with their respective drive/drive carrier. Drive Present The Drive Present LED (Figure 1-2, F) illuminates green to indicate the hard disk drive in this disk slot is properly installed and powered up. Drive Activity When illuminated steady or blinking green, the Drive Activity LED (Figure 1-2,G) indicates normal drive activity for the hard disk drive in this slot.
1-6 DEU Overview
Drive Status When illuminated amber, the Drive Status LED (Figure 1-2, H) indicates a failed or problem drive. The conditions that can cause this are listed below. !
Faulty or rebuild stopped (steady amber)
!
Rebuild in progress (blinking amber)
Rear Panel LED Indicators Figure 1-3 shows the LEDs located on the rear of the DEU. Subsections following this illustration describe the function of these LED indicators in detail. A
3
4
2
1
4 3 2 1
Figure 1-3. DEU Rear Panel LEDs
Power Supply The Power Supply LED (Figure 1-3, A) illuminates green to indicate the power cord is connected to an AC power source and power has been applied to the power supply. The LED is off to signify that the ac power has been interrupted or the power supply has failed.
DEU Overview 1-7
Fan Alarms The four Fan Alarm LEDs (Figure 1-3, 1, 2, 3, 4) monitor the status of the four fans located in the DEU. An amber LED indicates that the fan has failed. Figure 1-3 also shows the physical location of the fans indicated by the four LEDs located on the rear panel. Two fan assembles, each containing two fans, are easily removed from the top of the DEU in the unlikely event of a fan failure.
Chassis Features The DEU chassis (Figure 1-4) is an easy-to-expand, fabricated metal structure. The major DEU internal components are shown in the following illustration.
H
I
G
J
F E D C
K
B
A
Front A.
Hard Disk Drive Bays (8)
G.
Optional Two-Channel SCSI Interface Board
B.
SCSI Backplane
H.
Optional Redundant Power Supply Slot
C.
Power and GEM Board
I.
Basic Power Supply Slot
D.
Fan Assembly Connector (Fan1 and Fan2)
J.
Right Power and GEM Board Ejector Lever
E.
Channel 1 SCSI Interface Connector (P1)
K.
Fan Assembly Connector (Fan3 and Fan4)
F.
Left Power and GEM Board Ejector Lever
Figure 1-4. DEU Internal Features
1-8 DEU Overview
Rear Panel Features Figure 1-5 shows the location of rear system features and connectors. D
C
E F
B
G
A
J
K
H
I
A.
Component Rail (Right Side)
G.
Fan3 Alarm LED (See Figure 1-3)
B.
AC input power connector. Supplies AC power to the power supply.
H.
Fan1 Alarm LED (See Figure 1-3)
C.
DC Power-on LED. Lit when AC power is connected to the power supply and the power supply is functioning normally. Off if the power supply fails or the AC power to the power supply has been interrupted.
I.
Fan2 Alarm LED (See Figure 1-3)
D.
Optional Redundant Power Supply slot.
J.
Fan4 Alarm LED (See Figure 1-3)
E.
Channel 2 External Wide SCSI Connector Input (Optional)
K.
Standard Power Supply Unit. Supplies power to the DEU.
F.
Channel 1 External Wide SCSI Connector Input
Figure 1-5. Rear Panel Features
DEU Overview 1-9
2 Setting Up The DEU !
Overview
!
Selecting a Site
!
Unpacking the DEU and Rack Mounting Hardware
!
Rack-Mount Subsystem Assembly
!
Cabling Connections
!
Connecting the Power Cord(s)
!
Powering On/Off
Overview This chapter describes how to select a site, unpack the DEU and provides you with assembly information for preparing and mounting the DEU into a system rack. DEU to host configurations are also described.
Selecting a Site The DEU operates reliably in a typical office environment. Choose a site that is: !
Near grounded, three-pronged power outlets. Note: For the United States and Canada, this means a NEMA 5-15R outlets for 100-120 VAC or NEMA 6-15R outlets for 200-240 VAC. For other international sites, this means three-pronged power outlets applicable for the electrical code of the region.
! WARNING Be sure the power service connection is through a properly grounded outlet.
! CAUTION Be sure that the power plug from each of the power supplies is plugged into the same common ground power outlets.
!
Clean, dust-free, and well ventilated. Front and rear ventilating openings kept free of obstructions. Away from sources of heat, vibration or physical shock.
!
Isolated from strong electromagnetic fields and electrical noise produced by electrical devices (such as air conditioners, large fans, large electric motors, radio and TV transmitters, and high-frequency security devices)
!
Spacious enough to provide at least five inches (13 centimeters) behind the DEU and three inches (eight centimeters) on each side of the DEU for proper cooling, airflow, and cable clearance. Note: Provide an additional five inches (13 centimeters) behind the DEU to facilitate changing the self-contained hotswap power supply unit.
!
Easily accessible for DEU maintenance and installation of DEU upgrades.
2-2 Setting Up Your DEU
Unpacking the DEU and Rack Mounting Hardware ! WARNING The DEU weighs approximately 44 pounds (20.0 kg). If the DEU contains numerous optional devices, it will weigh more. To avoid personal injury, make sure you have someone help you lift or move the DEU.
Although the DEU and rack mount kit is inspected and carefully packaged at the factory, damage may occur during shipping. Follow these steps for unpacking. 1. Visually inspect the shipping containers; notify your carrier immediately of any damage. 2. Place the DEU shipping container on a flat, clean, stable surface. Carefully remove the DEU and set it aside. If the DEU is damaged, notify your server representative. See Figure 2-1,A) 3. Carefully remove the Rack Mount Kit parts and verify the contents. See Figure 2-1, B, C, D and E and Table 2-1. If parts are missing or the hardware is damaged, notify your server representative. Note: The mounting brackets (Figure 2-1, D, E) may already be installed on your DEU. 4. Save the containers and packing materials for any future reshipment. A
E
B
D
C
Figure 2-1. Rack Mount Kit Parts Setting Up Your DEU 2-3
Table 2-1. DEU and Rack Mount Parts Reference
Description
A
Disk Expansion Unit (DEU)
B
Hardware
C
Slide Rail Mounting Assemblies (2)
D
Left 2.5-inch DEU Mounting Bracket
E
Right 2.5-inch DEU Mounting Bracket
Rack-Mount Subsystem Assembly Before You Begin Before you begin, please review the following cautions, warnings, and general guidelines. !
Avoid excessive vibration and shock. Dropping an electronic component can cause serious damage.
!
Do not disconnect or remove parts other than those specified in the procedure.
!
Do not touch I/O connector pins.
!
All screws are Phillips-head, unless otherwise specified.
Static Precautions An electrostatic discharge (ESD) can damage disk drives, option boards, and other components. You can provide some ESD protection by wearing an antistatic wrist strap attached to chassis ground when handling DEU components. Electronic devices can be easily damaged by static electricity. To prevent damage, keep them in their protective packaging when they are not installed in the DEU.
2-4 Setting Up Your DEU
Replacing the DEU Rack-mounting Brackets Note: The mounting brackets (Figure 2-2, B, C) may already be installed on your DEU. If already installed, proceed to the next section. Two types of DEU rack-mounting brackets are included with your DEU. The long mounting brackets are approximately 5 inches in length and are shown in Figure 2-2, A. The short mounting brackets are 2 ½ inches in length and are shown in Figure 2-2, B and C. Your DEU requires the short mounting brackets to securely fasten it to the rack frame. If your DEU was shipped with the long mounting brackets installed, perform the following procedure to install the short mounting brackets.
C
B A
Left Right Figure 2-2. DEU Rack-mounting Brackets
1. Remove four screws securing each long mounting bracket to the DEU (Figure 2-2, A). Set the mounting brackets aside and save the screws for use in the next two steps. 2. Position the left short mounting bracket on the left side of the DEU as shown and secure with two of the screws saved in Step 1 (Figure 2-2, B). Refer to Figure 2-2 to identify the left and right mounting brackets. 3. Position the right short mounting bracket on the right side of the DEU as shown and secure with two of the screws saved in Step 1 (Figure 2-2, C).
Setting Up Your DEU 2-5
Preparing the Mounting Brackets and Rail Assemblies Each slide rail assembly consists of two rack mounting brackets, an outer slide rail and an inner component rail. See Figure 2-3. These pieces can be separated and adjusted. The distance between the rack mounting brackets (A and D) is adjustable to fit between the front and rear rails of the system rack. The slide rails (C) attach to the rack mounting brackets (A and D), and the component rail (B) attaches to the side of the DEU chassis. D C
A
B
Figure 2-3. Slide Rail Assembly (2)
1. Refer to Figure 2-4. Extend the component rail (C) from the slide rail (A) until the component rail release latch (B) clicks. Holding down the latch, slip the component rail out of the slide rail, as shown in Figure 2-4. Remove the component rail from the other slide rail.
A
B
C
2
T2R1-7.eps
Figure 2-4. Removing the Component Rail from the Slide Rail.
2-6 Setting Up Your DEU
2. Attach each small component rail to the DEU chassis as follows. !
Referring to Figure 2-5, align the mounting holes in the component rail (A) to the threaded holes in the DEU chassis. The right angle end (B) of the component rail is positioned toward the front of the DEU chassis.
!
Secure the rail to the chassis with three screws from the kit. B
A
Figure 2-5. Attaching the Component Rail to the DEU Chassis
3. Referring to Figure 2-6, remove the three screws securing the slide rail (A) to the rear mounting bracket (B). These screws are installed into a rectangular plate (C) located behind the rear mounting bracket. Position the rear mounting bracket exactly as shown and secure with the three screws. Do not completely tighten the screws as the rear mounting bracket will be adjusted when the rail assembly is installed into the system rack.
C B
A
Figure 2-6. Positioning the Rear Mounting Bracket
4. Select an appropriate location in the rack cabinet for the rack-mount DEU. To improve rack stability, mount heavier items towards the bottom of the rack cabinet. Note: When planning the DEU configuration for the rack cabinet you should consider the length of the cables that interconnect DEU components.
Setting Up Your DEU 2-7
Attaching the Mounting Bracket Assembly to the Rack The tabs on the front of the mounting bracket help to align it with the front of the rack frame. Cage nuts are not used for the front attachment of the mounting bracket. 1. Attach a mounting bracket assembly to the front of the rack using Phillipshead screws. Do not use washers. Do not tighten. See Figure 2-7.
A
Figure 2-7. Attaching the Mounting Bracket Assembly to the Front of the Rack
2. Lengthen the rear mounting bracket as necessary and carefully align the rear mounting bracket assembly with the rear rack frame. 3. Secure the rear mounting bracket assembly to the back corner brace of the rack with two Phillips-head screws. The rear mounting bracket assembly attaches exactly like the front mounting bracket assembly shown in Figure 2-7. 4. Securely tighten the Phillips screws installed in steps 1 and 3. 5. Tighten the three screws securing the rear mounting bracket to the slide rail assembly. See Figure 2-6 for the location of these three screws. 6. Repeat Steps 1 through 5 for the remaining mounting bracket assembly. 7. Install a cage nut two holes above the top screw of each front mounting bracket. See Figure 2-7, A. These cage nuts are used to secure the DEU to the system rack.
2-8 Setting Up Your DEU
Installing the DEU into the System Rack
! WARNING To reduce the risk of personal injury or damage to the equipment, a minimum of two people MUST lift the DEU into the rack. The DEU weighs 44 pounds (20.0 kilograms). If the unit is to be loaded above chest level, a third person must assist in aligning the rails while the other two support the unit.
! CAUTION To make the DEU lighter and more manageable, do not install hard disk drives in the DEU until after you load the DEU into the rack.
1. Pull the slide rails forward from the mounting brackets until the slide rail locks in place. 2. With one person grasping each side of the DEU, carefully align the DEU’s component rails with the rack’s slide rails and slide the server into the rack. The component rail release latches (Figure 2-8, A) on either side of the DEU lock the DEU on to the slide rails.
A
Figure 2-8. Installing the DEU into the System Rack
Setting Up Your DEU 2-9
! WARNING To reduce the risk of personal injury, be careful when pressing the slide rail release latches and sliding the component into the rack. The slide rails could pinch your fingertips.
3. Depress the slide rail release latch and slide the DEU into the rack. The first time you slide the DEU into the rack, you may have to apply some pressure. After the first time, the ball bearings in the slide will move easily. 4. Secure the DEU to the System rack with two Phillips head screws.
Cabling Connections The DEU supports the American National Standard Institute SCSI parallel interface standards, referred to as Wide Ultra160/m. This standard is backward compatible with Fast SCSI (SCSI-2 with the Wide option), also referred to as Fast Wide SCSI. These standards define the mechanical, electrical, and timing requirements. In compliance with these interface standards, certain limitations apply when considering the configuration, lengths of cabling, and termination.
Termination SCSI cabling configurations require termination at both ends of the SCSI bus. If you are using a controller that provides Term Power, no change is required and SCSI bus termination will occur automatically. The Host Controller card provides termination for one end of the SCSI bus, while the DEU board provides final termination at the other end of the bus.
Cabling Configurations Figures 2-9 through 2-11 illustrate SCSI cabling configurations: single channel, single host configuration; dual channel, single host configuration; and dual channel, dual host configuration. In the single channel, single host configuration shown in Figure 2-9, channel 0 of the host controller connects to a bank of up to eight disk hard disk drives in the DEU. In the dual channel, single host configuration shown in Figure 2-10, each channel of the host controller connects to a bank of up to four disk hard disk drives in the DEU. In the dual channel, dual host configuration shown in Figure 2-11, each host controls up to four hard disk drives in the DEU. Refer to the host controller and operating system software documentation for additional configuration information.
2-10 Setting Up Your DEU
Contact the local sales representative for information on cables used in the following configurations. Host Controller (RAID or SCSI)
Ch 0
Disk Expansion Unit
Host System
Figure 2-9. Single Channel, Single Host Configuration
Host Controller (RAID or SCSI) Ch 1 Ch 0
Disk Expansion Unit
Host System
Figure 2-10. Dual Channel, Single Host Configuration
Host Controller (RAID or SCSI)
Host Controller (RAID or SCSI)
Ch 0
Ch 0
Host System A
Disk Expansion Unit
Host System B
Figure 2-11. Dual Channel, Dual Host Configuration Setting Up Your DEU 2-11
Connecting the Power Cord(s) The DEU contains a 340-watt power supply. The power supply is designed for automatic sensing of 115 or 230 Vac power, eliminating the need for a line voltage selector switch. The power supply operates at a frequency of 50/60 Hz. A second optional power supply may be installed providing redundant power. If two power supplies are installed and one fails, the second power supply will ensure the DEU continues to operate without interruption. Connect each power cord as follows. 1. Plug the female end of the AC power cord into its socket on the back of the power supply. !
You may need to slide the plug-lock away from the socket to allow insertion of the plug into the socket.
!
To unplug the power cord, slide the lock away from the plug while carefully pulling it out of the socket. Do not pull on the cord, only the plug.
2. Plug the male end of the power cord into NEMA 5-15R outlet for 100-120 VAC or NEMA 6-15R outlet for 200-240 VAC. If the power cord(s) supplied with the DEU are not compatible with the AC outlet in the region, obtain a suitable power cord that meets the following criteria. !
The power cord must be rated for the available AC voltage and have a current rating that is at least 125% of the current rating of the DEU.
!
The power cord connector that plugs into the wall outlet must be terminated in a grounding-type male plug designed for use in the region. It must have certification marks showing certification by an agency acceptable in the region.
!
The power cord connector that plugs into the DEU must be an IEC- type CEE-22 female connector.
!
The power cord must be less than 1.8 meters (6.0 feet) long.
! WARNING The DEU shipped with a power cord for each power supply. Do not attempt to modify or use the supplied AC power cord if it is not the exact type required.
2-12 Setting Up Your DEU
Powering On/Off Power to the DEU is controlled by an external termination power signal from the host. Upon detection of the termination power signal, power is automatically switched on in the DEU. The DEU will power up automatically when the host system is powered up. However, a 5V standby voltage is present in the DEU as soon as the AC power cord is connected to the DEU. If the SCSI bus is divided into two channels, each of which is connected to a different host server, the first host server that is powered up controls the powering up of the DEU. This configuration is shown in Figure 2-11.
Setting Up Your DEU 2-13
3 Assembly and Disassembly !
General Information
!
Static Precautions
!
Preparing Your DEU for Upgrade
!
Removing the DEU from the Rack
!
Hard Disk Drives
!
Power Supply
!
Replacing a Fan
!
Removing and Replacing the Top Cover
!
Adding the Two-Channel SCSI Board
!
! !
!
Removing and Replacing the Power and GEM Board Removing and Replacing the SCSI Backplane Removing and Replacing the Fan LED Cable Assembly Installing the DEU into the System Rack
General Information
! WARNING Before doing the procedures in this manual, make sure that your DEU is powered off and unplug the AC power cords from the back of the chassis. Failure to disconnect power before opening your DEU can result in personal injury and equipment damage.
! CAUTION Operating your DEU with the covers removed can damage your DEU components. For proper cooling and airflow, always replace all covers before powering on your DEU.
Static Precautions An electrostatic discharge (ESD) can damage disk drives, the DEU board, and other components. You can provide ESD protection by wearing an antistatic wrist strap attached to chassis ground when handling DEU components. Electronic devices can be easily damaged by static electricity. To prevent damage, keep them in their protective packaging when they are not installed in your DEU.
3-2 Assembly and Disassembly
Preparing Your DEU for Upgrade Depending on the upgrade, you may need one or more of the following tools: !
Phillips screwdriver (#1 bit and #2 bit)
!
Flat-head screwdriver
!
Small needle nose pliers
!
Pen or pencil
!
ESD workstation or antistatic wrist strap (recommended)
The following components maybe added or removed from the DEU without removing the DEU from the system rack. !
Hard Disk Drives
!
Power Supplies
!
Fan Assemblies
The DEU must be removed from the system rack before these components are removed from the DEU. !
Optional 2-Channel SCSI Interface Board
!
Power and GEM Board
!
SCSI Backplane
!
LED Cable Assembly.
Assembly and Disassembly 3-3
Removing the DEU from the Rack ! WARNING To reduce the risk of personal injury or damage to the equipment, a minimum of two people MUST lift the DEU out of the rack. The DEU weighs 44 pounds (20.0 kilograms).
! CAUTION To make the DEU lighter and more manageable and to protect your hard disk drives from damage, consider removing the hard disk drives in the DEU before removing the DEU from the rack.
1. Terminate all applications and power down the host server(s) connected to the DEU. Powering down the host will also power down the DEU. 2. Open the front and rear doors to the system rack. 3. Tag and remove cables connected to the DEU. 4. Remove the two screws securing the DEU to the front of the system rack. 5. Pull the DEU out of the rack until the component rail release latches engage. The component rail release latches on either side of the DEU lock the DEU onto the slide rails.
! WARNING To reduce the risk of personal injury, be careful when pressing the component rail release latches and sliding the component in or out of the rack. The slide rails could pinch your fingertips.
! WARNING A minimum of two persons is required when performing the next step.
6. With one person grasping each side of the DEU, depress the component rail release latches and slide the DEU out the rack. Place the DEU on a flat clean surface. See Figure 3-1.
3-4 Assembly and Disassembly
Figure 3-1. Component Rail Release Latch.
Hard Disk Drives Your DEU supports a variety of SCSI hard disk drives. The SCSI drives must use the industry standard 80-pin Single Connector Attachment (SCA) connector. Contact your sales representative or dealer for a list of approved devices. The internal hard disk drives are located in the SCSI disk drive bays. If you are adding or removing a SCSI hard disk device, consider the following:
! CAUTION Do not hot swap a single-ended disk drive into an LVD-diskdrive only DEU for it may cause data corruption. The only way a single-ended disk drive can be used with an all LVDdisk-drive DEU is by first powering down the DEU, installing the single-ended disk drive, and then powering the DEU back up.
Note: Installing a single-ended disk drive into an all LVD-disk-drive DEU causes all the drives to operate in the non-LVD mode, thereby reducing performance.
SCSI ID Assignment Your DEU contains a single hard disk drive cage containing one SAF-TE controller and slots to hold a maximum of eight hard disk drives. SCSI ID addresses for the SAF-TE controller and drives are identical whether your DEU is configured for one or two SCSI channels. The hard disk SCSI address assignments for drives in the drive cage are shown in Figure 3-2 and Table 3-1. Note: When the DEU is configured for two-channel operation, there is one SAF-TE controller on each SCSI bus, with a SCSI ID of 4.
Assembly and Disassembly 3-5
Hard Disk Drive Bays 1
2
3
4
ID0
ID1
ID2
ID3
5
6
7
8
ID8
ID9
IDA
IDB
Figure 3-2. SCSI ID Address Assignments Table 3-1. SCSI ID Address Assignments Bay
Device
SCSI ID Address
1
First Hard Disk (Left side)
0
2
Second Hard Disk
1
3
Third Hard Disk
2
4
Fourth Hard Disk
3
5
Fifth Hard Disk
8
6
Sixth Hard Disk
9
7
Seventh Hard Disk
A
8
Eighth Hard Disk (Right side)
B
-
SAF-TE Controller
4
Installing or Swapping a Hard Disk Drive in a Hot-swap Bay This procedure describes installing a new drive or swapping out a faulty drive from one of the eight hot-swap SCSI disk drive bays. The SCSI drives use the industry standard 80-pin Single Connector Attachment (SCA) connector. Each drive must be installed in a drive carrier. Note: To order a disk with a carrier, contact your sales representative or dealer. !
If installing new drives, follow an installation scheme starting with the left-hand drive. Fill the bays left to right.
!
If your DEU is connected to a RAID host controller, hard disk drives may be removed or installed without powering down the DEU; if your DEU is connected to a non-RAID SCSI host controller, you must power down the host server controlling power to the DEU before hard disk drives may be removed and installed in the DEU
3-6 Assembly and Disassembly
!
If an individual SCSI drive fault LED (amber light) is on steadily, this indicates that the drive has been flagged as faulty by the RAID host controller. Follow the procedure described in this section to remove the faulty drive and swap in a good one. Note: ESD can damage disk drives, boards, and other parts. This DEU can withstand normal levels of environmental ESD while you are hot-swapping SCSI hard drives. However, we recommend that you do all procedures in this chapter only at an ESD workstation or provide some ESD protection by wearing an antistatic wrist strap attached to chassis groundany unpainted metal surfaceon your DEU when handling parts.
! CAUTION Drive manufacturers caution against moving a disk drive that is still spinning because of possible damage to the drive. After you determine which drive has been flagged as faulty, the procedure is the same to swap a drive or to install one for the first time.
Installing or Swapping a Hard Disk Drive 1. If your DEU is connected to a non-RAID SCSI host controller, terminate all applications and power down the host server(s) connected to the DEU. Powering down the host will also power down the DEU. 2. Open the front door of the system rack. 3. If installing a hard disk drive in a disk carrier for the first time, perform the following procedures: !
Remove the dummy sponge from the bay in which you are installing the new disk drive. See Figure 3-3
Figure 3-3. Removing the Dummy Sponge
Assembly and Disassembly 3-7
Note: The dummy sponge is provided to maintain proper cooling. Leave the dummy sponges in unused slots. (Keep all removed dummy sponges for future use.) !
If installing a new drive, go to step 5.
4. If swapping a hard disk drive, remove its carrier from the SCSI hard disk drive bay by performing the following procedures:
! CAUTION Depending on the drive fault, the drive may be still spinning when you remove it. Follow the next steps exactly when removing drives.
!
Pull the disk carrier handle out.
!
Pull the faulty disk drive out of the bay far enough to disengage the drive connector from the backplane. Wait 30 seconds until the drive spins down.
!
Remove the carrier from of the drive bay.
5. Remove the hard disk drive from the disk carrier by removing the four screws. See Figure 3-3 6. Remove the new drive from its protective wrapper, and place on an antistatic surface.
! CAUTION Observe static precautions. Use an antistatic wrist strap.
7. Record the drive model and serial numbers in the equipment log. 8. Install the drive on the drive carrier (Figure 3-3). !
Place the drive on the carrier, with its connector facing the back of the carrier.
!
Turn the drive and carrier over and secure the drive in the carrier with the four screws supplied with the disk drive.
3-8 Assembly and Disassembly
Figure 3-3. Securing the Drive in the Carrier
9. Install the drive carrier with drive into the bay (Figure 3-4) as follows: !
Open the drive carrier handle.
!
Align the drive carrier with the bay guide rails.
!
Slide the drive carrier into the bay until it docks with the SCSI backplane connector.
!
Push on the carrier until the drive is completely seated into the SCSI backplane connector.
!
Press the carrier handle into its locked position so that it is flush with the front of the carrier.
Right
Wrong
Figure 3-4. Installing a Disk Carrier into the Bay
10. Close the front door on the system rack.
Assembly and Disassembly 3-9
Power Supply Your DEU may contain one or two power supplies. The second power supply is optional and provides a redundant configuration that ensures continued operation of the DEU in the unlikely event one of the power supplies fails. This section provides procedures for installing a second power supply as well as removing a faulty power supply.
Installing the Optional Power Supply To install the optional power supply: 1. Open the rear door of the system rack. 2. Loosen the two screws on the blank cover attached to the power supply cage on the rear of the DEU and remove the blank cover. See Figure 3-5, A. A
Figure 3-5. Removing the Power Supply Cage Blank Cover
3. Referring to Figure 3-6, slide the optional power supply into the chassis and tighten the thumbscrews (A) that secure the power supply to the cage. A
Figure 3-6. Installing the Power Supply
4. Connect the power cord to the input receptacle on the rear of the new power supply and the AC outlet.
3-10 Assembly and Disassembly
5. Observe the green LED on the installed power supply is lit indicating the supply is operational. 6. Close the system rack rear door.
Replacing a Power Supply When a power supply unit fails, the power failure LED on the front of DEU lights and the green LED on the failed power supply is extinguished. See Figure 1-2 for the location of the front panel power failure LED. 1. If the optional power supply is not installed, power down the host server(s) connected to the DEU. Powering down the host will also power down the DEU; if the optional power supply is installed, the faulty power supply may be removed without powering down the DEU. 2. Open the rear door of the system rack. 3. Disconnect the AC cable from the failed power supply unit. 4. Loosen the two thumbscrews (see Figure 3-6) that secure the power supply assembly to the rear panel. 5. Remove the power supply from the rear of the DEU chassis. 6. Referring to Figure 3-6, slide the replacement power supply into the chassis and tighten the thumbscrews (A) that secure the power supply to the cage. 7. Connect the power cord to the AC outlet and to the input receptacle on the rear of the new power supply. 8. Close the system rack rear door and power up the host server, if necessary. 9. Observe the green LED on the installed power supply is lit indicating the supply is operational.
Assembly and Disassembly 3-11
Replacing a Fan The DEU contains two hot-swappable cooling fan assemblies as part of a faulttolerant, hot-swap design. Each fan assembly contains two high capacity cooling fans. Should any of the fans fail they may be replaced without powering down the DEU. Figure 3-7A shows the location of the two fan assemblies. A group of four LED indicators, located on the rear panel of the DEU, monitor the status of each of the four fans in the DEU. Should one of the fans fail, its corresponding LED will light to indicate the fan has failed. Referring to Figure 3-7, the fan LEDs on the rear panel of the DEU are numbered 1 through 4 and correspond to the fan numbers shown next to the fan assemblies A and B in this illustration. Fans 1 and 2 are located in fan assembly B, while fans 3 and 4 are located in fan assembly A.
3
4
4 3
2
1
A
2 1
C B
Figure 3-7. Fan Assembly Locations
To replace a fan: 1. Open the front and rear doors of the system rack. 2. Observe the LEDs located on the rear panel of the DEU and determine which of the fans requires replacement. See Figure 3-7. 3. Remove the screws securing the DEU to the front rails of the system rack.
3-12 Assembly and Disassembly
4. Pull the DEU out of the rack until the component rail release latches engage. The component rail release latches on either side of the DEU lock the DEU onto the slide rails. 5. Select the fan assembly you are removing and squeeze its latches (Figure 3-7, C) towards each other while lifting the assembly up and away from the DEU. Set the fan assembly on a clean dry surface. 6. Install the replacement fan assembly into the DEU.
! WARNING To reduce the risk of personal injury, be careful when pressing the component rail release latches and sliding the component in or out of the rack. The slide rails could pinch your fingertips.
7. Push in on the component rail release latches and push the DEU into the rack. See Figure 3-1. 8. Secure the DEU to the system rack frame with the screws removed in Step 3.
Assembly and Disassembly 3-13
Removing and Replacing the Top Cover 1. Remove the DEU from the system rack by following procedures previously described in this chapter. 2. Remove the fan assemblies from the DEU chassis. Squeeze the fan assembly latches (Figure 3-8, B) towards each other while lifting the assembly up and away from the DEU. Remove both fan assemblies and set them aside. 3. Remove the two screws securing the top cover to the rear of the DEU chassis. See Figure 3-8. 4. Slide the top cover towards the rear of the DEU chassis until its tab fasteners unlock. Lift the top cover up and away from the chassis. 5. Reverse Steps 1 through 4 to install the top cover and fan assemblies and to install the DEU into the system rack.
A
B
Figure 3-8. Removing the DEU top Cover
3-14 Assembly and Disassembly
Adding the Two-Channel SCSI Board ! CAUTION Observe static precautions. Use an antistatic wrist strap.
1. Remove the DEU from the system rack by following procedures previously described in this chapter. 2. Remove the DEU top cover by following procedures previously described in this chapter. 3. Remove the socket cover, if present, from the two-Channel SCSI Board connector P2 (see Figure 3-9, A). 4. Remove the screw (Figure 3-9, B) securing the top left corner of the power supply cage (as viewed from the front of the DEU). Keep this screw for later use.
B
A
Figure 3-9. Preparing to Install the Two-Channel SCSI Board
5. Remove the two screws securing the blank plate covering the optional SCSI connector cutout on the rear panel of the DEU (Figure 3-10, A). Remove the blank cover.
Assembly and Disassembly 3-15
Disk Expansion Unit
A
Figure 3-10. Removing the SCSI Blank Panel
6. Connect the internal SCSI cable to the cabinet. Position the cable's connector inside the cabinet at the position from which the dummy cover was removed. Ensure the connector is positioned in the same direction as the internal SCSI cable already mounted. Secure the connector with the two hex-nuts supplied. See Figure 3-11. A
B
Figure 3-11. Installing the Internal SCSI Cable
7. Connect the secured internal SCSI cable to the option board. Verify that no connector pins of the cable are bent. See Figure 3-12. 8. Position the option board with its SCSI cable connector facing toward the rear of the cabinet and insert the board into the slot. Ensure it is firmly seated. See Figure 3-12, A. 9. Secure the option board bracket to the power supply cage using the screw removed in Step 4. See Figure 3-12, B. 10. Install the DEU top cover by following procedures previously described in this chapter.
3-16 Assembly and Disassembly
11. Install the DEU into the system rack by following procedures in the next section of this chapter.
B
A
Figure 3-12. Install the Two-Channel SCSI Board
Assembly and Disassembly 3-17
Removing and Replacing the Power and GEM Board ! CAUTION Observe static precautions. Use an antistatic wrist strap.
Removing the Power and GEM Board 1. Remove the DEU from the system rack following procedures previously described in this chapter. 2. Remove the DEU top cover following procedures previously described in this chapter. 3. Remove the power supply following procedures previously described in this chapter. Also, remove the second optional power supply, if installed. 4. Disconnect the SCSI cable from the SCSI connector on the Power and GEM Board. See Figure 3-13, A. 5. Disconnect the fan LED cable from the Power and GEM Board. See Figure 3-13, B. 6. Remove three screws (Figure 3-13, C) securing the power supply cage (D) to the chassis. Perform the next step, if the two-channel SCSI board is installed. Otherwise proceed to Step 8. 7. Remove the two-channel SCSI board from its slot in the Power and GEM Board. Tag and remove the SCSI cable connected to the two-channel SCSI board and set the board aside on an anti-static surface. 8. Remove the power supply cage and set it aside. See Figure 3-13, D. 9. Remove the two screws securing the Power and GEM Board tray ejectors to the chassis. See Figure 3-13, E.
3-18 Assembly and Disassembly
B C E
D E
A
Figure 3-13. Preparing to Remove the Power and GEM Board
10. Pull both ejectors (Figure 3-14, A) up at the same time to disengage the Power and GEM Board from the SCSI backplane. Holding the ejectors, lift the board and remove it and the attached ejector tray from the DEU chassis. Place the assembly on a clean, flat, antistatic surface. A
A
Figure 3-14. Removing the Power and Gem Board
Assembly and Disassembly 3-19
11. Remove thirteen screws (Figure 3-15, A and B) securing the Power and GEM Board to the ejector tray. Referring to Figure 3-15, screws shown at (A) secure the board to the ejector tray and screws shown at (B) secure the board to standoffs permanently attached to the ejector tray. Remove the Power and GEM Board from the ejector tray. 12. Remove the clear plastic insulator sheet covering the components of the Power and GEM Board and save it for installation on the replacement board. A
B
B
A Figure 3-15. Removing the Power and GEM Board from the Ejector Tray
Replacing the Power and GEM Board 1. Position the clear plastic insulator sheet over the components on the Power and GEM Board. 2. Position the Power and GEM Board over the standoffs of the ejector tray and secure the board to the tray with thirteen screws. See Figure 3-15. A, and B. 3. Open the Power and GEM Board ejector levers and position the board in the DEU chassis so that the pivot point of the ejector arms fit into the slots in the DEU chassis. Close both ejector levers at the same time so that the front connectors of the board mate with the connectors of the SCSI backplane. 4. Install the two screws securing the Power and GEM Board tray ejectors to the chassis. See Figure 3-16, E. 5. Position the power supply cage (Figure 3-16, D) over the three mounting holes. If your DEU includes the two-channel SCSI board, perform the next step, otherwise go to step 7. 6. Connect the SCSI cable removed in step 7 of the previous procedure to the two-channel SCSI board. Install the two-channel SCSI board into its slot on the Power and GEM Board. See Figure 3-12.
3-20 Assembly and Disassembly
B C E
D E
A
Figure 3-16. Installing the Power and GEM Board
7. Install three screws (Figure 3-16, C) securing the power supply cage (D) to the chassis. The left screw also secures the two-channel SCSI board bracket to the power supply cage. 8. Connect the fan LED cable to the Power and GEM Board. See Figure 3-16, B. 9. Connect the SCSI cable from the SCSI connector on the Power and GEM Board. See Figure 3-16, A. 10. Install the power supply following procedures previously described in this chapter. Also, install the second optional power supply, if removed. 11. Install the DEU top cover following procedures previously described in this chapter. 12. Install the DEU into the system rack following procedures in this chapter.
Assembly and Disassembly 3-21
Removing and Replacing the SCSI Backplane Removing the SCSI Backplane 1. Remove the Power and GEM Board following procedures previously described in this chapter. Removing the Power and GEM Board involves performing several other procedures. 2. Ensure all hard disk drives are removed from the DEU. 3. Referring the Figure 3-17, remove the seven screws (B) and single pop rivet (C) securing the SCSI backplane (A) to the DEU chassis. 4. Lift the SCSI backplane up and out of the DEU. 5. Remove the clear plastic insulator sheets attached to each side of the SCSI backplane and set aside for use with the replacement SCSI backplane.
B A
C
Figure 3-17. Replacing the SCSI Backplane
Replacing the SCSI Backplane 1. Position the clear plastic insulator sheets over the components on each side of the replacement SCSI backplane. 2. Position the SCSI backplane in the channel behind the hard disk drive slots inside the DEU. 3. Referring the Figure 3-17, install seven screws (B) and single pop rivet (C) to secure the SCSI backplane (A) to the DEU chassis. 4. Install previously removed hard disk drives into the same slots from which they were removed. 3-22 Assembly and Disassembly
5. Install the Power and GEM Board following procedures previously described in this chapter. Installing the Power and GEM Board involves performing several other procedures.
Removing and Replacing the Fan LED Cable Assembly The Fan LED Cable Assembly is located inside the DEU and consists of a twisted-pair cable harness that includes four LED indicators at one end and a single connector at the other end. The LED indicators are mounted on the rear panel of the DEU and the connector is plugged into the Power and GEM Board. Each of the four LEDs monitors one of the four fans located in the DEU Fan Box Assemblies. In the unlikely event of a fan failure, the corresponding fan indicator will light. Figure 3-18, A shows the location of the Fan LED Cable Assembly.
A
B
Figure 3-18. Fan LED Cable Assembly Location
Assembly and Disassembly 3-23
Removing the Fan LED Cable Assembly
! CAUTION Observe static precautions. Use an antistatic wrist strap.
1. Remove the DEU from the system rack by following procedures previously described in this chapter. 2. Remove the DEU top cover by following procedures previously described in this chapter. 3. Disconnect the fan LED cable from the Power and GEM board. See Figure 3-18, B. 4. Note the color coded wire and position of the four fan LEDs mounted in the LED sockets in the rear panel of the DEU. See Figure 3-19. The replacement LEDs sockets must be mounted in the same rear panel holes according to the wire color codes shown in Figure 3-19.
Blue
Brown
White Yellow
Figure 3-19. Fan LED Socket Locations (inside DEU view)
5. Squeeze the front tabs of the LED sockets and push the LED sockets out of the DEU rear panel. See Figure 3-20.
Figure 3-20. Removing the LED Assembly Sockets 3-24 Assembly and Disassembly
6. Spread the two rear tabs of each of the four LED sockets and pull the LED out the rear of the socket as shown in Figure 3-21. Save the sockets for use in the next step. Remove the Fan LED Cable Assembly from the DEU.
Figure 3-21. Removing the LED Assembly Sockets
7. Position the four LED’s of the replacement assembly into the appropriate holes in the mounting bracket. Refer to Figure 3-19 for correct orientation. 8. Snap each LED into an LED socket. 9. Snap each LED socket into its hole in the DEU rear panel. 10. Connect the LED cable to the Power and GEM Board See Figure 3-18, B. 11. Install the DEU top cover by following procedures previously described in this chapter. 12. Install the DEU into the system rack by following procedures described in this chapter.
Assembly and Disassembly 3-25
Installing the DEU into the System Rack ! WARNING To reduce the risk of personal injury or damage to the equipment, a minimum of two people MUST lift the DEU out of the rack. The DEU weighs 44 pounds (20.0 kilograms) empty. If your DEU contains the two-channel SCSI board option and numerous hard disk drives, it will weigh more.
! CAUTION To make the DEU lighter and more manageable and to protect your hard disk drives from damage, consider removing the hard disk drives in the DEU before installing the DEU into the rack.
1. Pull the slide rails forward from the mounting brackets until the slide rail locks in place. 2. With one person grasping each side of the DEU, carefully align the DEU’s component rails with the rack’s slide rails and slide the server into the rack. The component rail release latches (Figure 3-13, A) on either side of the DEU lock the DEU on to the slide rails.
A
Figure 3-13. Installing the DEU into the System Rack
3-26 Assembly and Disassembly
! WARNING To reduce the risk of personal injury, be careful when pressing the slide rail release latches and sliding the component into the rack. The slide rails could pinch your fingertips.
3. Depress the slide rail release latch and slide the DEU into the rack. Secure the DEU to the System rack with two Phillips head screws. 4. Connect the power and SCSI interface cables to the rear panel of the DEU. 5. Close the front and rear doors of the system rack. 6. Power up the DEU host server.
Assembly and Disassembly 3-27
4 Problem Solving !
Introduction
!
Static Precautions
!
Troubleshooting Table
Introduction This chapter provides information to help you identify and solve problems that may occur during DEU installation or while using your DEU.
! CAUTION Operating your system with the side panels removed can damage your system components. For proper cooling and airflow, always replace the side panels before powering on your system.
Static Precautions An electrostatic discharge (ESD) can damage disk drives, option boards, and other components. You can provide some ESD protection by wearing an antistatic wrist strap attached to chassis ground when handling system components. Electronic devices can be easily damaged by static electricity. To prevent damage, keep them in their protective packaging when they are not installed in your system.
Initial DEU Startup Incorrect installation or configuration usually causes problems that occur at initial system startup. Hardware failure is a less frequent cause. If you have problems during initial system startup, check the following: !
Is the DEU power cord(s) properly connected to the plugged into a NEMA 5-15R outlet (100-120 Vac) or a NEMA 6-15R outlet (200-240 Vac)?
!
Is AC power available at the outlet?
!
Is the power LED on the front panel of the DEU lit?
!
Are all SCSI interface cables correctly connected and secured?
!
Are the DEU hard disk drives properly formatted or defined?
If the above items are all correct, but the problem persists, refer to the troubleshooting table.
4-2 DEU Problem Solving
Troubleshooting Table Symptom
Reason
Solution
DEU fails to power on.
Power cord(s) not connected properly.
Verify that the power cords are properly connected to the power supplies.
Power not available at the outlet.
If the DEU is plugged into a three-hole grounded outlet, verify if power to the outlet has been interrupted. This can be accomplished by testing the outlet with a known working appliance, like a lamp.
Power not applied to the host controller
Be sure that the host server is powered up and functioning properly.
Faulty power cord.
Replace power cord.
SCSI cables not attached to host controller.
Attach SCSI cables to the host controller and then power-up the host.
SCSI cables not attached to DEU
Attach SCSI cable to the DEU and then power-up the host.
DEU Problem Solving 4-3
5 Illustrated Parts Breakdown !
Exploded View
!
Field Replaceable Units
!
Hard Disk Drives
This section provides an exploded view and parts lists for the 3UDEU major assemblies. Part numbers are also provided for optional hardware.
5-2 Illustrated Parts Breakdown
Exploded View 1
2 3
4
5
6
7 8
Illustrated Parts Breakdown 5-3
Field Replaceable Units Unless otherwise noted part numbers are for use in the United States and Europe. Table 6-1. Field Replaceable Units Reference Number Description
Part Number
1
Fan Box Assembly
133-467367-009-A
2
N8581-13E 340W Power Supply Unit
133-463907-101-A Alternate: 313-01509-000
3
Fan LED Cable Assembly
133-467367-003-A
4
2 Channel SCSI Board
157-01504-000
5
Power and GEM Board
133-467367-001-A
6
Nylon Pop Rivet SCSI Backplane
133-467367-006-A
7
SCSI Backplane
133-467367-002-A
8
Slide Rail Kit (2)
247-01626-000
Cable List Description
Part Number
CBL, Internal SCSI including screws
133-467367-004-A
CBL, External SCSI, Host to 3UDEU, 1M
320-01516-000
CBL, External SCSI, Host to 3UDEU, 3M
320-01515-000
5-4 Illustrated Parts Breakdown
Hard Disk Drives Upgrades Description
Part Number
Kit, 9 GB SCSI, 7200 RPM
BDH-7968-00-00
Kit, 9 GB SCSI, 10000 RPM
BDH-1968-00-00
Kit, 18 GB SCSI, 7200 RPM
BDH-7868-00-00
Kit, 18 GB SCSI, 10000 RPM
BDH-1868-00-00
Kit, 36 GB SCSI, 10000 RPM
BDH-1668-00-00
Replaceable Parts Description
Part Number
9 GB HDD, 7200RPM, SCSI, 80 Pin, ST39236LC
260-01518-000
9 GB HDD, 10000RPM, SCSI, 80 Pin, ST39204LC
260-01519-000
18 GB HDD, 7200RPM, SCSI, 80 Pin, ST318436LC
260-01522-000
18 GB HDD, 10000RPM, SCSI, 80 Pin, ST31840LC
260-01523-000
36 GB HDD, 10000RPM, SCSI, 80 Pin, ST336704LC
260-01520-000
Illustrated Parts Breakdown 5-5
A Specifications !
3UDEU
!
Two-channel SCSI Board
Specifications Table A-1lists specifications for the 3UDEU. Table A-1 3UDEU Specifications Dimensions
Width
445 mm (17.5 in)
Height
129 mm (5.08 in)
Depth
700 mm (27.5 in) (Includes power supply handle)
Weight
20.0 kg (44.1 lbs) (with no disks installed) 32.5 kg (71. 65 lbs) (maximum configuration)
Power Requirements
Voltage
100 to 240 VAC ± 10%, one single-phase 15A system
Frequency
50/60 Hz ± 3 Hz
AC inlet shape
Parallel with bi-polar grounding
Power consumption
344 VA (maximum configuration)
Calorific value
67.6 KJ
Noise
60 dB (power level) or less
Environmental requirements Temperature
10 to 35°C
Humidity
20 to 80%
External Interface
Ultra160/m LVD SCSI
1 channel (2 channels with the AZA-2084 optional board installed) In 2-channel mode (2 channels available), each SCSI bus may have up to 4 disks connected.
Alarm notification
SAF-TE command interface using the SCSI bus
Power link
Linked with the TERMPWR of the SCSI bus
Power redundancy
Available with UBS-0250 installed.
A-2 Specifications
Table A-2 lists specifications for the two-channel SCSI Board. Table A-2. Two-channel SCSI Board Specifications Dimensions
Width
107 mm (4.2 in)
Height
97 mm (3.8 in)
Depth
12 mm (.5 in)
Weight
0.2 kg (.44 lbs)
Power Requirements
Voltage
100 to 240 VAC ± 10%, one single-phase 15A system
Frequency
50/60 Hz ± 1 Hz
Power Consumption
1.88 VA
Calorific value
0.36 KJ
Environmental Requirements
Temperature
10 to 35°C
Humidity
20 to 80%
External Interface
Ultra160/m LVD SCSI
This board divides the SCSI bus to two channels. Each SCSI bus may have up to 4 disks connected.
Alarm notification
SAF-TE command interface using the SCSI bus
Power link
Linked with the TERMPWR of the SCSI bus
Specifications A-3
Glossary A Asynchronous Operations
Operations that bear no relationship to each other in time but can overlap. The concept of asynchronous I/O operations is central to independent access arrays in throughput-intensive applications.
C Cache Flush
Refers to an operation where all un-written blocks in a Write-Back Cache are written to the target disk. This operation is necessary before powering down the system. Channel
Refers to one of the SCSI bus connectors on the controllers or termination interface cards. Cluster
A group of independent computer systems working together as a single system, using a shared disk storage such as a disk expansion unit (DEU). In a two-node cluster, both servers are "active," i.e. servicing client requests just like two network servers. If one of the servers fail, the surviving server initiates a "failover" and the applications running on the failed server can be moved to the surviving server, transparently to clients.
Consistency Check
Refers to a process where the integrity of redundant data is verified. For example, a consistency check of a mirrored drive will make sure that the data on both drives of the mirrored pair are exactly the same. For RAID level 3 and 5 redundancy, a consistency check will involve reading all associated data blocks, computing parity, reading parity, and verifying that the computed parity matches the read parity.
D Disconnect/Reconnect
Disconnect is a function that allows a target SCSI device (typically a disk drive that received a request to perform a relatively long I/O operation) to release the SCSI bus so that the controller can send commands to other devices. When the operation is complete and the SCSI bus is needed by the disconnected target again, it is reconnected. Disk Mirroring
Data written to one disk drive is simultaneously written to another disk drive. If one disk fails, the other disk can be used to run the system and reconstruct the failed disk.
Glossary 1
Disk Spanning
Several disks appear as one large disk using this technology. This virtual disk can then store data across disks with ease without the user being concerned about which disk contains what data. The subsystem handles this for the user. Disk Striping
Data is written across disks rather than on the same drive. Segment 1 is written to drive 0, segment 2 is written to drive 1, and so forth until a segment has been written to the last drive in the chain. The next logical segment is then written to drive 0, then to drive 1, and so forth until the write operation is complete. Duplexing
This refers to the use of two controllers to drive a disk subsystem. Should one of the controllers fail, the other is still available to provide disk I/O. In addition, depending how the controller software is written, both controllers may work together to read and write data simultaneously to different drives.
F Fault-Tolerant
When something is fault-tolerant it is resistant to failure. A RAID 1 mirrored subsystem, for example, is fault-tolerant because it can still provide disk I/O if one of the disk drives in a mirrored system fails.
H Hot Spare
The “Hot Spare” is one of the most important features the controller provides to achieve automatic, non-stop service with a high degree of fault tolerance. This rebuild operation will be carried out by the controller automatically when a SCSI disk drive fails.
L Logical Drive
A set of contiguous chunks of a physical disk. Logical disks are used in array implementations as constituents of logical volumes or partitions. Logical disks are normally transparent to the host environment, except when the array containing them is being configured.
M Mapping
The conversion between multiple data addressing schemes, especially conversions between member disk block addresses of the virtual disks presented to the operating environment by the array management software. Mirroring
Refers to the 100% duplication of data on one disk drive to another disk drive. Each disk will be the mirror image of the other.
2 Glossary
P Partition
An array virtual disk made up of logical disks rather than physical ones. Also called logical volume. Physical Drive
A physical array (or drive) is a collection of physical disks governed by the RAID management software. A physical drive appears to the host computer as one or more logical drives.
R RAID
(Redundant Array of Independent Disks) An approach to using multiple low cost drives as a group to improve performance, yet also provide a degree of redundancy that makes data loss remote. RAID 0
Block “striping” is provided, yielding higher performance than is possible with individual drives. This level does not provide any redundancy. RAID 1
Drives are paired and mirrored. All data is 100% duplicated on an equivalent drive. RAID 10
RAID 10 is a combination of RAID levels 0 and 1. The data is striped across disks as in RAID 0. Each disk has a mirror disk, as in RAID 1. RAID 3
Data is striped across several physical drives. For data redundancy one drive is encoded with rotated XOR redundancy. RAID 30
Data striping of two or more RAID 3 arrays. RAID level 30 is a combination of 0 and 3. RAID 5
Data is striped across several physical drives. For data redundancy drives are encoded with rotated XOR redundancy. RAID 50
RAID level 50 is a combination of RAID level 0 and 5. RAID Controller
This refers to the controller card that routes data to and/ or from the CPU. Disk array controllers perform all RAID algorithms onboard the controller.
Glossary 3
Rebuild
The regeneration of all data from a failed disk in a RAID level 1, 3, 5, or 6 array to a replacement disk. A disk rebuild normally occurs without interruption of application access to data stored on the array virtual disk. Rotated XOR Redundancy
This term (also known as “parity”) refers to a method of providing complete data redundancy while requiring only a fraction of the storage capacity for redundancy. In a system configured under RAID 3 and 5, all data and parity blocks are divided between the drives in such a way that if any single drive is removed (or fails), the data on it can be reconstructed using the data on the remaining drives. (XOR refers to the Boolean “Exclusive-OR” operator.)
S SAF-TE
Is the acronym for SCSI Accessed Fault-Tolerant Enclosures. It is a monitoring and communication specification developed by Conner (nStor) and Intel for sending and receiving server and storage system status information via the SCSI bus. Session
Refers to the period of time between any two consecutive system shutdowns. System shutdown may be either a power off/on, or a hardware reset. SCSI Drive
A disk drive equipped with a small computer system interface (SCSI). Each disk drive will be assigned a SCSI address (or SCSI ID), which is a number from 0 to 15. The SCSI address uniquely identifies the drive on the SCSI bus or channel. Spanning
Disk spanning allows multiple disk drives to function like one big drive. Spanning overcomes lack of disk space and simplifies storage management by combining existing resources or adding relatively inexpensive resources. Striping
Disk striping writes data across multiple disks rather than on one disk. disk striping involves partitioning each drive storage space into stripes that can vary in size from one sector (1 KB) to several megabytes. Stripe Order
The order in which SCSI Drives appear within a Physical Pack. This order must be maintained, and is critical to the controller’s ability to “Rebuild” failed drives. Stripe Width
Refers to the number of kilobytes per stripe block.
4 Glossary
T Target ID
A target ID is the SCSI ID of a device attached to the disk array controller. Each SCSI channel can have up to sixteen SCSI devices (target ID from 0 to 15) attached to it.
W Write-Through Cache
Refers to a cache writing strategy whereby data is written to the SCSI Drive before a completion status is returned to the host operating system. This caching strategy is considered more “secure,” since a power failure will be less likely to cause loss of data. However, a Write-Through cache results in a slightly lower performance, in most environments.
Glossary 5
Index C Cable List, 5-4 Cabling Configurations, 2-10 Cabling Connections, 2-10 Configuring and Upgrading, 3-1 Connecting the Power Cord(s), 2-12
Powering On/Off, 2-13 Problem Solving, 4-1
R Rack-Mount Subsystem Assembly, 2-4 Redundant Cooling Fans, 1-4 Remote/Delay Start, 1-3
D
S
DEU Controls and Indicators, 1-5 DEU Security, 1-5 DEU Startup, 4-2 Disk Drive Status Indicator LEDs, 1-6
SAF-TE Board, 1-4 Selecting a Site, 2-2 Setting Up Your DEU, 2-1
F
Termination, 2-10 Troubleshooting, 4-2 Troubleshooting Tables, 4-3
Fast SCSI, 2-10 Fast Wide SCSI, 2-10 Field replaceable units hard disk drives, 5-5 Field Replaceable Units, 5-4
H
T
U Ultra SCSI Fast 20, 2-10 Unpacking the DEU, 2-3
Hard Disk Drives Installing or Swapping, 3-6 SCSI ID Assignment, 3-5 Hot Swappable Power Supplies, 1-4 Hot Swappable SCSI Disk Drive Bays, 1-3
I I/O Panel Connectors, 1-4
L Line voltage, 2-12
O Overview, 1-2
P Power connecting, 2-12 Power Supply removing, 3-10
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