On Wednesday 06 June 2007 09:47, Phil Thayer wrote:
As for figuring out the second parity calculation on RAID 6, what the manufacturers are realizing is that they don't necessarily have to have a different parity algorithm to calculate the second parity. Simply putting the same XOR parity data on two separate disks will provide the same RAID 6 functionality as having a second parity calculation with lower overhead on controllers. The old KISS methodology is coming back into play. I think you will see more and more of the manufacturers going this route.
That only works if one of the dead disks is a parity disk...