I did a 'pull-the-drive' test on a raid6 array with a write-journal and
found that mdadm (v4.0-218-gfe05dc4 - 2017-11-09) would not let me
--re-add the drive so I add to --add it.
mdadm: --re-add for /dev/sdq1 to /dev/md124 is not possible
My expectation was that the drive would be recognized as being the
missing member and would be re-added and only out-of-sync regions would
be resync'd.
When I --add'ed the drive to the array the resync process started for
the entire array, not just for the out-of-sync regions. Is this correct
behavior for arrays with write journals? Are there plans to perform a
selective re-sync rather than a full re-sync?
--Larkin
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