• NeilBrown's avatar
    [PATCH] md: better handling of readerrors with raid5. · 4e5314b5
    NeilBrown authored
    This patch changes the behaviour of raid5 when it gets a read error.
    Instead of just failing the device, it tried to find out what should have
    been there, and writes it over the bad block.  For some media-errors, this
    has a reasonable chance of fixing the error.  If the write succeeds, and a
    subsequent read succeeds as well, raid5 decided the address is OK and
    Instead of failing a drive on read-error, we attempt to re-write the block,
    and then re-read.  If that all works, we allow the device to remain in the
    Signed-off-by: default avatarNeil Brown <neilb@suse.de>
    Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
raid5.c 56.9 KB