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EIDE and Serial ATA 1.0
3.5-inch/1-inch
Because desktop drives offer high capacity at a lower-than-SCSI cost, an unprecedented number of RAID systems are being designed around desktop drives. But life in a desktop computer doesn’t compare to the extreme environment in an always-on, high duty cycle RAID system. What’s needed is a drive engineered to thrive in a high-intensity RAID system while still offering traditional desktop value. That drive is the WD Caviar RE. Designed and manufactured to enterprise-class standards, WD Caviar RE drives provide enhanced reliability in a 24x7, high duty cycle environment. In addition, they offer a RAID-specific time-limited error recovery feature that improves compatibility with RAID adapters. WD Caviar RE hard drives are ideal for RAID server applications such as video surveillance, enterprise backup, document management, scientific computing, and similar demanding storage environments.
Product Benefits !
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7200 RPM !
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120, 160 and 250 GB
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Reliability in high duty cycle environments – utilizing enterprise-class manufacturing processes, these drives are designed with enhanced reliability in a 24x7, continuous duty environment. RAID-specific time limited error recovery – improves compatibility with RAID adapters and prevents drive fallout caused by extended drive error-recovery processes. 8 MB cache – provides a higher percentage of cache hits and significantly faster time to data than industry-standard 2 MB versions. Fluid Dynamic Bearing (FDB) technology – improves hard drive reliability; reduces heat, vibration, and noise. Improved power controller – consumes less power and generates low heat. Data Lifeguard Tools™ – software utility that works in conjunction with the embedded Data Lifeguard™ features (including shock protection, an environmental protection system, and embedded error detection and repair features) to make hard drive installation, management, and diagnostics simple and worry-free.
SATA-specific Features EIDE WD1200SB WD1600SB WD2500SB SATA WD1200SD WD1600SD WD2500SD Note: All products may not be available in all regions of the world.
FlexPower™– connector technology that accepts power from either industry-standard or new SATA power supplies. ! Hot plug support – allows swapping of hard drives without having to power down the system or reboot; promotes system design flexibility, data availability, and serviceability. ! Backplane compatibility – uses the SATA industry standard connector which includes alignment ears and 3-stage electrical mating sequence, designed specifically for backplanes and hot pluggability. ! SATA latching connector – provides a secure connection between the hard drive and the cable connector via a locking latch mechanism. Recommended: Western Digital's Serial ATA cable with SecureConnect™ provides a 500 percent stronger cable-to-drive connection than first-generation SATA hard drives and cables; for use with Western Digital SATA drives only. !
IMPORTANT: Because of the time-limited error recovery feature, this product is intended for server applications and is not recommended for use in desktop systems.
EIDE Hard Drives
SATA Hard Drives
Physical Specifications Model number Interface Form factor Formatted capacity1 User sectors per drive Bytes per sector (STD) Dedicated landing zone Actuator latch/auto park Warranty2
Physical Specifications 120 GB
160 GB
250 GB
WD1200SB EIDE 100 MB/s 3.5-inch 120,034 MB 234,441,648 512 Yes Yes 3-year
WD1600SB EIDE 100 MB/s 3.5-inch 160,041 MB 312,581,808 512 Yes Yes 3-year
WD2500SB EIDE 100 MB/s 3.5-inch 250,059 MB 488,397,168 512 Yes Yes 3-year
Model number Interface Form factor Formatted capacity User sectors per drive Bytes per sector (STD) Dedicated landing zone Actuator latch/auto park Warranty
120 GB
160 GB
250 GB
WD1200SD SATA 1.5 Gb/s 3.5-inch 120,034 MB 234,441,648 512 Yes Yes 3-year
WD1600SD SATA 1.5 Gb/s 3.5-inch 160,041 MB 312,581,808 512 Yes Yes 3-year
WD2500SD SATA 1.5 Gb/s 3.5-inch 250,059 MB 488,397,168 512 Yes Yes 3-year
Performance Specifications Data Transfer Rate 100 MB/s -Buffer to host3 -Buffer to disk 61 MB/s sustained
Performance Specifications Data Transfer Rate 150 MB/s -Buffer to host5 -Buffer to disk 61 MB/s sustained
Read seek Track-to-track seek4 Full stroke read seek4 Average latency Rotational speed Read cache Write cache Buffer Drive ready time Master/slave support IORDY support LBA support Error rate (non-recoverable)
Read seek Track-to-track seek Full stroke read seek Average latency Rotational speed Read cache Write cache Buffer Drive ready time LBA support Error rate (non-recoverable)
8.9 ms (average) 2.0 ms (average) 21 ms (average) 4.2 ms 7200 RPM Adaptive Yes 8 MB 7.0 sec average Yes Yes Yes <1 in 10 14 bits read
8.9 ms (average) 2.0 ms (average) 21 ms (average) 4.2 ms 7200 RPM Adaptive Yes 8 MB 9.0 sec average Yes <1 in 10 14 bits read
WD Serial ATA cable with SecureConnect
For service and literature: 800.ASK.4WDC U.S.A. +31.20.4467651 Europe 949.672.7199 Spanish support.wdc.com www.westerndigital.com
Western Digital's Serial ATA cable with SecureConnect provides a 500 percent stronger cable-to-drive connection than first-generation SATA hard drives and cables; for use with Western Digital SATA drives only.
1 Western
Digital defines a megabyte (MB) as 1,000,000 bytes and a gigabyte (GB) as 1,000,000,000 bytes. Some operating systems use the binary numbering system which yields a lower reported capacity. on bulk WD Caviar RE hard drives. This standard warranty may be subject to variations imposed by local law or regulations. the specified Ultra ATA transfer mode.
2 Three-year standard warranty 3 Maximum burst rate running 4 On reads and writes. 5
Effective maximum transfer rate running Serial ATA 1.0.
Western Digital, the Western Digital logo, and WD Caviar are registered trademarks, and WD, Data Lifeguard, Data Lifeguard Tools, SecureConnect, FlexPower, and FIT Lab are trademarks of Western Digital Technologies, Inc. Other marks may be mentioned herein that belong to other companies. Product specifications subject to change without notice. © 2004 Western Digital Technologies, Inc. All rights reserved. Western Digital 20511 Lake Forest Drive Lake Forest, California 92630 U.S.A. 2879-001119-A02 06/04
