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Silver 3.5 inch bare hard drive with exposed circuit board

Western Digital

Western Digital RE3 WD2502ABYS 250GB 7200 RPM 16MB SATA 3.0Gb/s 3.5" internal hard drive

SKU CH-RH3H-N4M6A MPN WD2502ABYS

A 250 GB 3.5" desktop drive spinning at 7200 RPM with 16 MB cache and a SATA 3.0 Gb/s interface

  • Total capacity250 GB
  • Interface typeSATA 3.0Gb/s
  • Form factor3.5 in (8.89 cm)
  • Packaging typeBare Drive
  • Rotational speed7,200 RPM
  • Cache memory16 MB
  • 7200 RPM spindle speed gives fast data access
  • 16 MB cache buffers bursts for smoother throughput
  • SATA 3.0 Gb/s interface fits legacy servers and workstations
  • Third-generation dynamic fly height adjusts head clearance in real time
  • Fourth-generation RAFF technology corrects linear and rotational vibration simultaneously

Enterprise SATA drive for server workloads

The Western Digital RE3 WD2502ABYS is a 250GB 3.5" internal hard drive built for business-critical server and storage applications. It runs at 7200 RPM with a 16MB cache and a SATA 3.0Gb/s interface. The bare-drive packaging suits system integrators and IT departments deploying high-reliability storage arrays.

Low-noise operation with vibration tolerance

Technologically advanced acoustics minimise operational noise while cool drive operation supports extended uptime. Fourth-generation RAFF technology monitors and corrects both linear and rotational vibration in real time, delivering up to 60% performance improvement in high-vibration environments. Average seek time is 8.9ms and average latency is 4.2ms.

Dynamic fly-height and burn-in reliability

Third-generation dynamic fly-height adjusts each read-write head in real time for optimum reliability across varying conditions. Every unit undergoes an extended thermal burn-in test before shipment. The low-profile 1.0-inch form factor fits standard 3.5" bays while the dual-processor architecture sustains throughput for demanding workloads.

How it compares

Measured against everything we stock in 3.5-Inch Internal Desktop HDDs, at today’s prices. Recalculated every night.

Price $50.99
Cheaper than about 77% of the 4,938 comparable items (median $107.99).
Total capacity 250 GB
Lower than about 90% of the 2,372 comparable items (median 2 TB).
Price per TB $203.96 per TB
Pricier than about 79% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameWestern Digital
Product lineRE3
Model nameWD2502ABYS
Total capacity250 GB
Performance
Rotational speed7,200 RPM
Average seek time8.9 ms
Mean latency4.2 ms
Storage
Cache memory16 MB
Ports & slots
Interface typeSATA 3.0Gb/s
Size & build
Form factor3.5 in (8.89 cm)
Shipping weight0.91 kg
Package size149 × 102 × 25 mm

Questions about this item

How do I install this 3.5" SATA drive and what step is often missed?

Mount the drive in a 3.5" bay, connect the SATA data cable and 15-pin SATA power connector, then enable the port in BIOS so the 250GB volume appears.

What maintenance or replacement will this RE3 drive need later?

No routine maintenance is required; replace the drive if SMART attributes report reallocated sectors or if the 7200 RPM mechanism develops unusual noise.

What limit appears first during sustained use of this 7200 RPM drive?

The SATA 3.0Gb/s interface caps sustained throughput, so long sequential transfers will hit that ceiling before the 16MB cache or mechanical speed becomes the bottleneck.

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