On 2017/10/16 12:30, Anand Jain wrote:
>
>
> On 10/13/2017 01:27 PM, Duncan wrote:
>> Misono, Tomohiro posted on Wed, 11 Oct 2017 11:18:50 +0900 as excerpted:
>>
>>> Add 'btrfs remove missing-all' to remove all the missing devices at once
>>> for improving usability.
>>>
>>> Example:
>>> sudo mkfs.btrfs -f -d raid1 /dev/sdb1 /dev/sdb2 /dev/sdb3 /dev/sdb4
>>> sudo wipefs -a /dev/sdb1 /dev/sdb3
>>> sudo mount -o degraded /dev/sdb2 /mnt <--
>
>
> I agree with Duncan here. This step itself will fail even with RO
> option. Do you have any patch that is not in the ML which will
> make this step a success in the first place ?
>
> Thanks, Anand
>
commit 21634a19f646 ("btrfs: Introduce a function to check if all chunks a OK
for degraded rw mount") allow this from 4.14 (I checked on 4.14-rc4).
But I will withdraw this patch as Duncan suggests.
Thanks,
Tomohiro
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