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H A D | raid1.c | 4706b349 Thu Feb 05 22:06:47 CST 2009 NeilBrown <neilb@suse.de> md: Allow read error in a single drive raid1 to be passed up.
If a raid1 only has a single working device and gets a read error, we choose to simply return that error up to the filesystem (or whatever) rather than failing the whole array.
However the codes doesn't quite do that. We attempt a readbalance which allocates the same drive, so we retry the read - indefinitely.
Instead: If read_balance in the error case chooses the same drive that just failed, treat it as a failure and don't retry.
Signed-off-by: NeilBrown <neilb@suse.de> 4706b349 Thu Feb 05 22:06:47 CST 2009 NeilBrown <neilb@suse.de> md: Allow read error in a single drive raid1 to be passed up. If a raid1 only has a single working device and gets a read error, we choose to simply return that error up to the filesystem (or whatever) rather than failing the whole array. However the codes doesn't quite do that. We attempt a readbalance which allocates the same drive, so we retry the read - indefinitely. Instead: If read_balance in the error case chooses the same drive that just failed, treat it as a failure and don't retry. Signed-off-by: NeilBrown <neilb@suse.de>
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