Summary: Will be buying 24 for these for a home NAS (Yes, complete overkill for a home NAS). I bought two of these and just barely got them running since yesterday. So far they've survived two extended tests using Western Digital's Lifeguard testing utility.
Pros: Has SAS onboard Fast Surprisingly not that loud at all
Cons: Being a SAS drive, it comes with a price Does run hot...you definitely need airflow on top for these.
Excellent drive, just make sure the warranty is included
David A. Flory, Amazon
20 July 2014
Summary: The drive itself is terrific. Although I didn't benchmark it, it positively screams with ~280MB/sec reads in RAID1 when paired with an older 3TB RE on a hardware controller. It would be probably be faster with a matching 4TB drive. The construction looks very good.
Summary: Be aware that these use SFF-8484 connectors, and you'll need the same. If you have a SAS backplane, chances are good that you do. If you have a SATA backplane or SATA card/cables, you do not. If you are using forward-fanout SAS cables, you might, but probably don't.
Pros: These are good, solid, reliable drives, backed with a good warranty.