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Make sure all changes to md/degraded are notified.

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When a device fails, when a spare is activated, when
an array is reshaped, or when an array is started,
the extent to which the array is degraded can change.

Signed-off-by: Neil Brown <[email protected]>
This commit is contained in:
Neil Brown 2008-06-28 08:31:43 +10:00
commit a99ac97113
2 changed files with 12 additions and 1 deletions
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Documentation/md.txt
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@ -392,6 +392,13 @@ also have
achieved. In that case, the transition to "recover" isn't
notified, but the transition away is.
degraded
This contains a count of the number of devices by which the
arrays is degraded. So an optimal array with show '0'. A
single failed/missing drive will show '1', etc.
This file responds to select/poll, any increase or decrease
in the count of missing devices will trigger an event.
mismatch_count
When performing 'check' and 'repair', and possibly when
performing 'resync', md will count the number of errors that are