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AEC -4312A ™
High-performance SCSI-to-SCSI External RAID Controller Overview Increasingly PCs, workstations, and servers need highly available external storage. The AEC-4312A SCSI-to-SCSI external RAID controller meets the need, delivering outstanding performance, easy upgrade capability, and simplified array configuration and management.
PRODUCT HIGHLIGHTS • Based on high-performance 133 MHz 5x86 microprocessor with 16 KBytes of L1 cache • Concurrent operation of PCI and microprocessor buses • Isolated processor and data memory • Wide UltraSCSI host and device channels for data transfer rates up to 40 MByte/sec per channel
The performance advantage of the AEC-4312A controller comes from its powerful combination of fast microprocessor, independent memory stores, isolated processor and data buses, and advanced cache algorithms. The host interface can be quickly and easily upgraded in the field. And easy-touse array management software lets users configure, monitor, and troubleshoot arrays.
Key Benefits High-performance architecture Everything about the architecture of the AEC-4312A external RAID controller is geared to outstanding throughput and fast response times.
• Field-upgradable host interface • Compact 3.5-inch form factor • Adaptec array management software for easy array configuration and management
The powerhouse of the AEC-4312A controller is an AMD 5x86 133 MHz microprocessor, equivalent to a 75 MHz Pentium processor. Two independent XOR memory controllers permit separate parity and data caching. This parallelism improves performances for repeated RAID 5 writes. Separate microprocessor and data buses overcome typical performance bottlenecks by minimizing PCI bus utilization and allowing concurrent operations. Performance can be further enhanced
using optional advanced algorithms for Write-back, Write-through, and Read-ahead cache. A dual-channel Wide UltraSCSI disk interface and single-channel host interface delivers data transfer rates up to 40 MByte/sec per channel. Storage flexibility A distinct advantage of AEC-4312A external RAID controller is flexibility. Its compact 3.5-inch form factor fits inside any disk enclosure. It controls up to 30 external hard drives in flexible array configurations. Featuring up to 32 Mbytes of user-configurable cache, the AEC-4312A controller allows several combinations of data and parity cache for optimizing performance and storage costs. And the AEC-4312A controller is completely operating-system independent. It supports all platforms — no special software or drivers required. Simple upgrade Change from single-ended SCSI to differential SCSI with a simple field upgrade. As performance requirements increase, simply swap daughter cards to go from the SCSI host interface to a 100 MByte/sec Fibre Channel interface. Upgrades to future technologies will be just as convenient. Easy configuration and management The AEC-4312A external RAID controller comes with easy-to-use array management embedded software. Arrays can be configured, monitored, and managed using Adaptec’s Disk Array Administrator.
TECHNICAL SPECIFICATIONS On-board CPU:
AMD 5X86 processor, 133 MHz, 16 KByte L1 cache
Host/device bus burst data rate: 40 MByte/sec Host interface No. of channels:
One, single-ended or differential
Protocol:
Fast, Wide (8 and 16 bit), and UltraSCSI
Device interface No. of channels:
Two, single-ended
Protocol:
Fast, Wide (8 and 16 bit), and UltraSCSI
Advanced RAID features:
Hot spare and hot swap of drives Array status monitoring Adjustable stripe width Automatic sector remapping
Advanced hardware features:
Fast-page cache memory using standard 72-pin SIMMs Up to 32 MByte user-configurable nonvolatile memory Flash upgradable firmware Independent memory stores allowing concurrent operations Write-through, Write-back, and Read-ahead cache
Advanced SCSI features:
Multiple SCSI PhaseEngine® co-processors 255 simultaneous commands Tagged command queuing
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Disconnect/reconnect UltraSCSI 20 MHz for data transfer up to 40 MByte/sec Wide SCSI connection for up to 15 devices per channel (30 total) Array support:
Drives can be configured for RAID levels 0, 1, 0/1, 4, and 5
Configuration and management: RS232 serial interface to PC or standard VT100 terminal Window and menu-based interface Performance statistic monitoring Event logging Rebuild and verify utilities MTBF:
Adaptec Singapore Tel: (65) 278-7300 Fax: (65) 273-0163
6.25 in. x 3.88 in. Z-axis height: 1.0 in. max
Backplane mating connector:
Robinson-Nugent with combined SCSI, RS232 serial port, I2C, miscellaneous IO and power
Power requirements:
5.0Vdc ± 5% at 3.0 amps typical 12.0Vdc ± 10% at 0.1 amp maximum± 5%
Battery backup:
5.0Vdc ± 5% at 1.0 amps peak, regulated switched battery power for disk cache DRAM
Temperature:
+5˚C to +50˚C operating -40˚C to +60˚C non-operating
Humidity :
Adaptec Europe–Belgium Tel: (32) 2-352-34-11 Fax: (32) 2-352-34-00 Adaptec Japan–Tokyo Tel: (81-3) 5276-9882 Fax: (81-3) 5276-9884
450,000 power-on hours1
PHYSICAL AND ENVIRONMENTAL SPECIFICATIONS Board form factor:
Adaptec, Inc. 691 South Milpitas Boulevard Milpitas, California 95035 Tel: (408) 945-8600 Fax: (408) 262-2533
10% to 85% noncondensing (operating) 5% to 90% noncondensing (non-operating)
Literature: 1-800-934-2766 (USA and Canada) or (510) 732-3829 Pre-Sales Suppport: 1-800-442-7274 (USA and Canada) or (408) 957-7274 World Wide Web: http://www.adaptec.com Internet FTP server: ftp.adaptec.com CompuServe: GO ADAPTEC Adaptec USA Bulletin Board Service (BBS): (408) 945-7727 (up to 28,800 bps, using 8 bits, 1 stop bit, no parity) Interactive Fax: (408) 957-7150
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Air flow:
400 ft/min (2.03 m/sec) minimum
Dew point (salt/fog):
TBD
1
Preliminary numbers
2
Allows exclusion of a heat-sink on the AEC-4312A controller. Air flow less than specified (including zero) requires heat-sink on processor for maximum operating ambient temperature of 50˚C
Copyright 1997 Adaptec, Inc. All rights reserved. Adaptec, the Adaptec logo, the Adaptec tagline, AEC, and PhaseEngine are trademarks of Adaptec, Inc., which may be registered in some jurisdictions. All other trademarks used are owned by their respective owners. Information supplied by Adaptec, Inc. is believed to be accurate and reliable at the time of printing, but Adaptec, Inc. assumes no responsibility for any errors that may appear in this document. Adaptec, Inc. reserves the right, without notice, to make changes in product design or specifications. Information is subject to change without notice. P/N 980296-011
Printed in U.S.A.
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