tree 6a0efe323cfaca9d180c0429c74697598c6d9a05
parent 41fe75f60bcd4d698daed3e54bb099227358ce58
author NeilBrown <neilb@suse.de> 1332121597 +1100
committer NeilBrown <neilb@suse.de> 1332121597 +1100

md: allow re-add to failed arrays.

When an array is failed (some data inaccessible) then there is no
point attempting to add a spare as it could not possibly be recovered.

However that may be value in re-adding a recently removed device.
e.g. if there is a write-intent-bitmap and it is clear, then access
to the data could be restored by this action.

So don't reject a re-add to a failed array for RAID10 and RAID5 (the
only arrays  types that check for a failed array).

Signed-off-by: NeilBrown <neilb@suse.de>