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  Western Digital Unveils WD Caviar RAID Edition HDs
  Western Digital today introduced WD Caviar RAID Edition (RE) hard drives, which are designed and manufactured to enterprise-class standards for high reliability in a host of server applications including e-mail, file, video and Web servers, and demanding environments such as scientific computing, enterprise backup, document image management, engineering data management. Currently shipping in volume, WD Caviar RE drives are equipped with either Serial ATA (SATA) or EIDE interfaces and 7,200 RPM spin speed.

With one million hours MTBF (Mean Time Between Failure), WD Caviar RE drives offer systems builders and storage system manufacturers high reliability in high-duty cycle applications, where around-the-clock performance and high reliability are critical. WD also built into its new RE drives a Time Limited Error Recovery (TLER) feature, which helps prevent drive fallout caused by extended desktop hard drive error-recovery processes. WD Caviar RE drives carry a three-year warranty and are offered in capacities of 250, 160 and 120 GB.

WD's FIT Lab (Functional Integrity Testing Lab) performed rigorous and extensive testing in order to certify one million hours MTBF and ensure its new RE hard drives are optimized for use in server environments.

Before WD's development of TLER, systems integrators and storage manufacturers commonly experienced hard drive fallout when using desktop drives in RAID (Redundant Array of Independent Disks) applications. By taking into account the distinct differences between single-user and multi-user workloads, WD Caviar RE drives implement RAID-specific TLER to improve drive compatibility with RAID controllers and significantly improve system reliability.


  • Time-limited error recovery (TLER) ?? improves compatibility with RAID adapters; prevents drive fallout caused by the extended hard drive error-recovery processes common to desktop hard drives.
  • 1 million hours MTBF ?? meets enterprise-class reliability standards.
  • 8 MB cache ?? provides a higher percentage of cache hits and significantly faster time to data than industry-standard 2 MB versions.
  • Fluid Dynamic Bearings (FDB) ?? improve hard drive reliability; reduce heat, vibration and noise.
  • 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.
  • Specifications

    Rotational Speed

    7,200 RPM (nominal)

    Buffer Size

    8 MB

    Average Latency

    4.20 ms (nominal)

    Contact Start/Stop Cycles

    0 minimum

    Seek Times (Average)

    Read Seek Time (Average)

    8.9 ms

    Write Seek Time (Average)

    10.9 ms (average)

    Track-To-Track Seek Time

    2.0 ms (average)

    Full Stroke Seek

    21.0 ms (average)

    Transfer Rates

    Buffer To Host (Serial ATA)

    1,200 Mbits/s (Max)

    Buffer To Disk

    748 Mbits/s (Max)

    Buffer To Disk

    61 MB/s (Sustained)

    It's important to note, that because of the time-limited error recovery feature, this product is intended for server applications and is not recommended for use in desktop systems. WD Caviar RE hard drives are currently shipping in volume. Estimated street pricing for WD Caviar RE 250 GB capacity with SATA interface (model no. WD2500SD) is $215 USD and WD Caviar RE 250 GB with EIDE interface (model no. WD2500SB) is $205 USD.

    Source: Western Digital

          Posted by: Agitator!!, August 3, 2004, 11:42 am  

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