Western Digital has introduced a new line of drives said to be specifically optimized for use in NAS devices. Known as the Red drives, these drives are specifically targeting NAS devices with one to six drives.
Storagereview.com has already performed tests and has provided a review of the new drives. As storagereview.com states:
WD has several features that they're touting as critical for the NAS user including; NASware specialized firmware, Intellipower low power spindle, robust NAS compatibility list, three year warranty and a dedicated WD Red 24x7 customer support line (1-855-55-WDRED if you need them).
Western Digital has worked with leading NAS manufacturers to ensure maximum compatibility:
WD has also gone to great lengths to ensure a great user experience. They've worked with Synology, QNAP and other NAS providers to make sure the WD Red was qualified as competible with these popular systems and host chipsets. The drives also offer a good blend of performance and power consumption, which is key given the always on nature of NAS drives. For that little extra push on the performance side, the drives feature a 64MB cache that's been migrated from DDR to DDR2, which should be twice as fast.
These new "Red" drives come in 1, 2 and 3 TB models, and they have 64MB cache along with a SATA 6Gb/s interface. Storagereview has provided a full page of performance charts, including charts derived from installing these drives in a Synology NAS server.
With low power consumption and decent performance, these drives seem like a good choice if you are going to populate a new NAS.
Prices look good for these new models although I can't find them for sale yet - but they should be soon. Here is Western Digital's product information page.