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[PATCH] md: teach raid5 the difference between 'check' and 'repair'.

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With this, raid5 can be asked to check parity without repairing it.  It also
keeps a count of the number of incorrect parity blocks found (mismatches) and
reports them through sysfs.

Signed-off-by: Neil Brown <neilb@suse.de>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
NeilBrown 2005-11-08 21:39:26 -08:00 • committed by Linus Torvalds
parent 24dd469d72
commit 9d88883e68
3 changed files with 25 additions and 2 deletions
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4
include/linux/raid/md_k.h
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@ -175,6 +175,10 @@ struct mddev_s
sector_t resync_mark_cnt;/* blocks written at resync_mark */
sector_t resync_max_sectors; /* may be set by personality */
sector_t resync_mismatches; /* count of sectors where
* parity/replica mismatch found
*/
/* recovery/resync flags
* NEEDED: we might need to start a resync/recover
* RUNNING: a thread is running, or about to be started