Re: RAID1: if one disk failed, what errors are expected?

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2016-06-30 14:57 GMT+03:00 Anand Jain <anand.jain@xxxxxxxxxx>:
>
>
> Thanks for reporting.
>
> Right. Application shouldn't notice the EIO. First of all,
> we are not stopping IO to the disk which is pulled out. The
> below patches 11/13 and 12/13 fixes it.
>
>  [PATCH 11/13] btrfs: introduce device dynamic state transition to offline
> or failed
>  [PATCH 12/13] btrfs: check device for critical errors and mark failed
>
>
> Next, if degraded mount fails, you will also need below patches.
> However there are two choices..
>
> Patch 1..5/13 are workaround fixes..
>  [PATCH 01/13] btrfs: Introduce a new function to check if all chunks a OK
> for degraded mount
>  [PATCH 02/13] btrfs: Do per-chunk check for mount time check
>  [PATCH 03/13] btrfs: Do per-chunk degraded check for remount
>  [PATCH 04/13] btrfs: Allow barrier_all_devices to do per-chunk device check
>  [PATCH 05/13] btrfs: Cleanup num_tolerated_disk_barrier_failures
>
> OR
>
> Below RFC patch which has the actual fix (lightly tested),
>  PATCH 0/2] [RFC] btrfs: create degraded-RAID1 chunks
>
> Could you please give it a try ?
>
> Thanks, Anand
>

Yes, i will, thanks.

-- 
Have a nice day,
Timofey.
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