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  • 4TB Expansion Kit for WD Sentinel DS5100/ DS6100
4 TB of storage
  • 4 TB 7200 64M SATA3 6GB/S
  • 24x7 reliability - With 1.2 million hours MTBF, these drives have the highest available reliability rating on a high-capacity drive.
  • RAID-specific time-limited error recovery (TLER) - Pioneered by WD, this feature prevents drive fallout caused by the extended hard drive error-recovery processes common to desktop drives.
  • Rotary Acceleration Feed Forward (RAFF) - Optimizes operation and performance when the drives are used in vibration-prone multi-drive systems.
  • Ideal for
    Upgrading the storage capacity of your WD Sentinel™ product with an additional 4 TB capacity.
    WD datacenter hard drives are the right blend of performance, reliability and capacity in a cost-effective platform.

    Product Specifications
    Cache/Buffer 64 MB
    Data transfer rate 171 MB/s (max)
    Interfaces SATA 6 Gb/s
    Rotational Speed 7200 RPM
    Physical Dimensions
    Height 1.1 Inches
    Depth 5.8 Inches
    Width 4.0 Inches
    Weight 1.6 Pounds
    Height 27.9 mm
    Depth 147.3 mm
    Width101.6 mm
    Weight 0.73 kg
    Environmental Specifications
    Operating Temperature 5°C to 55°C ( 41°F to 131°F)
    Non-op Temperature -40°C to 70°C (-40°F to 158°F)

    *Free Standard Shipping offered on all orders. Offer not valid for addresses in Hawaii or Alaska. The WD Store reserves the right to change or discontinue this offer at any time.