> -----Ursprüngliche Nachricht-----
> Von: Dmitrii Tcvetkov
> Gesendet: Di. 22.08.2017 12:28
> An: g6094199@xxxxxxxxxx
> Kopie: linux-btrfs@xxxxxxxxxxxxxxx
> Betreff: Re: degraded BTRFS RAID 1 not mountable: open_ctree failed, unable to find block group for 0
>
> On Tue, 22 Aug 2017 11:31:23 +0200
> g6094199@xxxxxxxxxx wrote:
>> So 1st should be investigating why did the disk not get removed
>> correctly? Btrfs dev del should remove the device corretly, right? Is
>> there a bug?
>
> It should and probably did. To check that we need to see output of
> btrfs filesystem show
> and output of
> btrfs filesystem usage
He Dimitry!
THX fror your suggestions.
root@vHost1:~# btrfs fi show /
Label: 'System' uuid: 35fdbfd4-5809-4a30-94c1-5e3ca206ca4d
Total devices 2 FS bytes used 17.00GiB
devid 6 size 50.00GiB used 22.03GiB path /dev/nvme0n1p1
devid 7 size 48.83GiB used 22.03GiB path /dev/sda1
root@vHost1:~# btrfs fi df /
Data, RAID1: total=19.00GiB, used=15.68GiB
System, RAID1: total=32.00MiB, used=16.00KiB
Metadata, RAID1: total=3.00GiB, used=1.32GiB
GlobalReserve, single: total=384.00MiB, used=0.00B
root@vHost1:/var/log# btrfs filesystem usag /
Overall:
Device size: 98.83GiB
Device allocated: 44.06GiB
Device unallocated: 54.76GiB
Device missing: 0.00B
Used: 34.11GiB
Free (estimated): 30.68GiB (min: 30.68GiB)
Data ratio: 2.00
Metadata ratio: 2.00
Global reserve: 384.00MiB (used: 0.00B)
Data,RAID1: Size:19.00GiB, Used:15.70GiB
/dev/nvme0n1p1 19.00GiB
/dev/sda1 19.00GiB
Metadata,RAID1: Size:3.00GiB, Used:1.36GiB
/dev/nvme0n1p1 3.00GiB
/dev/sda1 3.00GiB
System,RAID1: Size:32.00MiB, Used:16.00KiB
/dev/nvme0n1p1 32.00MiB
/dev/sda1 32.00MiB
Unallocated:
/dev/nvme0n1p1 27.97GiB
/dev/sda1 26.80GiB
> If there are non-raid1 chunks then you need to do soft balance:
> btrfs balance start -mconvert=raid1,soft -dconvert=raid1,soft
Yes of cause i did a balance after replacing the disk (see above). I'm aware of the problems occuring with single chunks, etc. I did again a soft balance as you have suggested, which finished within seconds.
> The balance should finish very quickly as you probably have only one of
> data and metadata single chunks. They appeared during writes when the
> filesystem was mounted read-write in degraded mode.
I guess the typical erros are now sorted out. i will reboot the machine with a currect hwe kernel and send the logs. Anything else i can do?
regards
sash
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