Western DigitalRE2-GP Enterprise 1 TB Bulk/OEM Hard Drive 3.5 Inch, 16 MB Cache, 5400RPM SATA II WD1000FYPS

Bought three of these and threw them into a hotswap backplane with another 500 i had laying around. Set them up in a Raid 5 with 1 hot spare.I'm not sure if i am realizing the energy saving benefits of the variable RPM's on this drive. My raid controller may not be letting them spin down while idle. Hard to tell. Either way if your dealing with minimal amounts of power in my opinion. Unless your dealing with a data center or your a complete green freak your really not saving alot of watts with these drives. You would be better off spending your money on a energy efficient PSU.5 year warranty, good cache size, nothing to complain about.Western Digital has good rma and service. Their advanced RMA lets you get a working drive while they examine your old one.

bought these for my NAS and have been going strong up to today, well over 2 years. never a problem. fairly silent.

First drive failed Diagnostics. Second drive from WDC, not the Vendor, was DOA (Drive was referbished, and just off the (re)assembly line. If you yell loud enough, WDC will swap out a NEW one not another referb. As they say, Third time is a charm. Works great, saves power. I don't notice the reduced performance over a straight 7200 RPM Drive. The Vendor was not to blame in any way for the drive problems. WDC needs to clean up their act, quality control is very poor on these drives.