Look out, Hitachi, Seagate, and Toshiba. Western Digital has amped up its enterprise product line by introducing the S25, its very first hard drive with a Serial Attached SCSI (SAS) interface, 10,000-RPM spindle speed, and 2.5" form factor.
A look at the S25's spec sheet reveals striking similarities with the VelociRaptor. While the latter has a more pedestrian Serial ATA interface, both it and the S25 have the same form factor, spindle speed, 300GB maximum capacity, 16MB cache, and 3-ms average latency. The two drives even weigh the same: 219 g (around 8 ounces) on average.
That said, the S25 supports 3Gbps and 6Gbps SAS interfaces, can purportedly reach sequential transfer speeds of up to 128MB/s, and has a longer mean-time-between-failures rating (1.6 million hours). It also consumes a little more power than the VelociRaptor, with 7.35W power draw while seeking and 5.18W at idle, up from 6.08W and 4.53W, respectively.
Thanks to its SAS interface, the new S25 should be a prime candidate for "mission-critical enterprise server and enterprise storage applications," according to WD. Shipments of S25 hard drives to "the two largest [PC vendors] in the industry," so you'll no doubt be seeing WD's new baby in pre-built servers and workstations before too long.
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