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Silver rectangular 3.5 inch SATA hard drive with circuit board visible underneath

Western Digital

Western Digital RE2 WD4001ABYS 400GB 7200RPM 3.5" SATA internal hard drive

SKU CH-21B9-XY957

A 400 GB 7200 RPM desktop SATA hard drive with 16 MB cache and RAID-focused features

  • 400 GB capacity stores large media libraries and backups
  • 7200 RPM spindle speed delivers quick file access and boot times
  • 16 MB cache buffers frequent reads for smoother multitasking
  • SATA 3 Gb/s interface connects directly to standard desktop motherboards
  • RAID-oriented features such as TLER and RAFF improve array reliability

400GB 7200RPM SATA desktop drive

This Western Digital RE2 WD4001ABYS is a 400GB 3.5 inch internal hard drive spinning at 7200RPM with a 16MB cache and a SATA 3Gb/s interface. It includes Active Power Save Technology, Native Command Queuing and Time-Limited Error Recovery for RAID environments. The drive weighs 2.0 pounds and is supplied new.

RAID and nearline workloads

The RE2 series targets RAID arrays and nearline storage where TLER and RAFF reduce drop-outs and vibration errors. It suits builders adding mirrored or parity volumes in a desktop chassis or entry-level server. Buyers who want more storage per bay or a 6Gb/s SATA link should look at higher-capacity or newer-interface drives.

SATA power and 3.5 inch bay

Verify your system has a free 3.5 inch drive bay, a SATA data cable and a SATA power connector from the power supply. The drive uses the standard 3Gb/s SATA signalling rate so it will negotiate down on a 6Gb/s controller but will not exceed 3Gb/s throughput. No additional drivers are required for mainstream operating systems.

Privalumai

  • 400 GB capacity stores large media libraries and backups
  • 7200 RPM spindle speed delivers quick file access and boot times
  • 16 MB cache buffers frequent reads for smoother multitasking
  • SATA 3 Gb/s interface connects directly to standard desktop motherboards
  • RAID-oriented features such as TLER and RAFF improve array reliability

Specifikacijos

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Will the WD4001ABYS work with my existing SATA power and data cables?

Yes, the drive uses a standard 3.5" SATA 3Gb/s interface and connects with ordinary SATA power and data cables.

Can I run this 3Gb/s RE2 drive on the same SATA controller as my older 1.5Gb/s hard disks?

The drive is backward compatible with SATA 1.5Gb/s controllers and will operate at the slower link speed alongside older disks.

How can I verify the WD4001ABYS is healthy and running at 7200RPM after installation?

Check SMART data for the rotational speed field and run a surface scan; the drive should report 7200RPM and show no reallocated sectors.

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