Here are the product sheets for the enterprise/NAS drives I was able to find:
Western Digital
XE Series: < 10 in 1017
RE Series: < 10 in 1016
SE Series: < 10 in 1015
Red Series: < 1 in 1014
Seagate
Enterprise 10K: < 1 in 1016
Constellation ES: < 1 in 1015
Constellation ES.3: < 1 in 1015
Constellation CS: < 1 in 1014
NAS HDD: < 1 in 1014
HGST
Ultrastar 7K4000: < 1 in 1015
A lower BER means less of a chance of having a RAID require a rebuild due to an un
In traditional RAID setups, the data is spread out across all drives in the RAID array. If you were running RAID 5 with six drives, for example you would have five drives worth of storage space, with the missing space being for parity data. If you lose one drive, you haven't yet lost all your data. Throw in a new drive, and rebuild your RAID array (and pray you don't run into an unrecoverable read error or silent corruption, because then you can kiss your data good-bye).
This has obvious advant
