Mark Hahn <[EMAIL PROTECTED]> writes: >>> not me. raid is too important to be trusted to hardware - have you >>> tried MD's check/scrub features? >> >> Yes, now. Or rather, Peter Kjellström has. >> >> If a raid 6 stripe has a corrupted block, it seems md "repairs" the >> damage by recalculating the parity blocks. Less than ideal... > > pardon my density, but what is the alternative?
Reconstruction. With raid 6, you can recover from single-disk corruption (As opposed to *failures*, where you get read errors from a disk. Raid 6 can handle two simultaneous disk *failures*.). See section 4 in: http://www.kernel.org/pub/linux/kernel/people/hpa/raid6.pdf Just recalculating the parity blocks does give you a consistent raid stripe, but destroys your data (unless it actually was one of the parity blocks that was corrupted). -- Leif Nixon - Systems expert ------------------------------------------------------------ National Supercomputer Centre - Linkoping University ------------------------------------------------------------ _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
