Which level of RAID will continue to operate correctly even after 2 drives in the array fail? RAID5, RAID6 or RAID10?
RAID 6 is the only RAID level that will work working under all possible two-drive failure scenarios. RAID 10 can SOMETIMES handle two failures, except when the 2 failed drives are in the same mirrored pair.
So, RAID 6 it is.
|show 2 more comments|
On of our clients runs Raid 5 with a 6 disk setup. The 6th being a hot swap, that way two drives can fail, the hot swap does it's job, leaving time for the two "failed" disks to be replaced. Rare that you would have two disks fail, but it can happen.