RE: Mechanism to safely force repair of single md stripe w/o hurtingdata integrity of file system

[Jan Engelhardt]

On Saturday 2008-05-17 22:26, Guy Watkins wrote:
>
>I thought this would cause md to read all blocks in an array:
>echo repair > /sys/block/md0/md/sync_action
>
>And rewrite any blocks that can't be read.
>
>In the old days, md would kick out a disk on a read error.  When you added
>it back, md would rewrite everything on that disk, which corrected read
>errors.

With a read bitmap (`mdadm -G /dev/mdX -b internal`, or during -C),
it should resync less after an unwarranted kick.
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