by Brian Beeler

Western Digital S25 SAS Hard Drives Announced

Western Digital has announced the family of S25 SAS hard drives, their third generation. The S25 hard drives feature a 2.5" form factor, with 10,000 RPM spin speed, 32MB cache and SAS 6 Gb/s interface and delivers 204 MB/s transfer rates. The S25 comes in 300GB, 450GB and 600GB capacities, along with a new 900GB offering. 

The W25 is highlighted not just by performance and capacity, but reliability as well. Western Digital offers a five year warranty with the S25 and a MTBF of 2 million hours. The S25 is also power friendly, taking down under 8 watts when active, and is the first to include support for T10 Protection Information (PI) for advanced data integrity, and the first to provide optional models that feature drive-level self-encryption that meets the Trusted Computing Group's specification for Enterprise Class A encryption.

WD S25 Specs

  • Rotational Speed 10,000 RPM (nominal)
  • Buffer Size 32 MB
  • Transfer Rate (Buffer To Disk) 204 MB/s (Sustained)
  • Capacities - 300GB, 450GB, 600GB and 900 GB
  • Interface SAS 6 Gb/s
  • Form Factor 2.5-inch Drive
  • 0.59" x 3.94" x 2.75"
  • Weight 0.51 Pounds
  • Operating Shock (Read) 65G, 2 ms
  • Non-operating Shock 300G, 2 ms
  • Idle Mode 30 dBA (average)
  • Seek Mode 0 37 dBA (average)
  • Operating 41° F to 131° F
  • Non-operating -40° F to 158° F
  • Read/Write 7.80 Watts
  • Idle 5.30 Watts
  • MTBF - 2 million hours
  • Five year warranty

Availability

WD S25 hard drives are currently shipping to OEMs with general availability expected in the second quarter. 

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