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DM RAID: Add ability to restore transiently failed devices on resume

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DM RAID: Add ability to restore transiently failed devices on resume

This patch adds code to the resume function to check over the devices
in the RAID array.  If any are found to be marked as failed and their
superblocks can be read, an attempt is made to reintegrate them into
the array.  This allows the user to refresh the array with a simple
suspend and resume of the array - rather than having to load a
completely new table, allocate and initialize all the structures and
throw away the old instantiation.

Signed-off-by: Jonathan Brassow <[email protected]>
Signed-off-by: NeilBrown <[email protected]>
This commit is contained in:
Jonathan Brassow 2013-05-02 14:19:24 -05:00 • committed by NeilBrown
commit 9092c02d94
4 changed files with 54 additions and 8 deletions
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1
Documentation/device-mapper/dm-raid.txt
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@ -222,3 +222,4 @@ Version History
1.4.2 Add RAID10 "far" and "offset" algorithm support.
1.5.0 Add message interface to allow manipulation of the sync_action.
New status (STATUSTYPE_INFO) fields: sync_action and mismatch_cnt.
1.5.1 Add ability to restore transiently failed devices on resume.