Re: SV: RAID-6 support in kernel?
From: Roy Sigurd Karlsbakk <hidden>
Date: 2002-06-04 12:59:55
Of course, for a 4 drive setup there's no reason to use RAID 6 at all (RAID 10 will withstand any two drive failure if you only use 4 drives), but that's the reasoning. I think the best way to deal with the read-modify write problem for RAID 6 is to use a small chunk size and deal with NxN chunks as a unit. But YMMV.
RAID10 will _not_ withstand any two-drive fail in a 4-drive scenario. If D1 and D3 fail, you're fscked D1 D2 D3 D4 -- Roy Sigurd Karlsbakk, Datavaktmester Computers are like air conditioners. They stop working when you open Windows.