Re: 'btrfs rescue' command (recommended by btrfs check) fails on old BTRFS RAID1 on (currently) openSUSE Leap 15.3

[Johannes Kastl <kastl@b1-systems.de>]

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Hi Qu,

On 21.05.22 at 03:10 Qu Wenruo wrote:

> At least we know the new way to fix it is working.
> 
> BTW, mind to share things like `btrfs fi usage` and `btrfs fi df` when
> you can mount the fs?

Sure, here they are:

>> root dumbo:/root # btrfs filesystem df /mnt/DUMBO_BACKUP_4TB
>> Data, RAID1: total=3.36TiB, used=3.24TiB
>> Data, DUP: total=13.50MiB, used=2.81MiB
>> Data, single: total=1.00GiB, used=0.00B
>> System, RAID1: total=32.00MiB, used=560.00KiB
>> System, single: total=32.00MiB, used=0.00B
>> Metadata, RAID1: total=284.94GiB, used=111.84GiB
>> Metadata, DUP: total=512.00MiB, used=48.00KiB
>> Metadata, single: total=1.00GiB, used=0.00B
>> GlobalReserve, single: total=512.00MiB, used=0.00B
 >> root dumbo:/root #

>> root dumbo:/root # btrfs filesystem show /mnt/DUMBO_BACKUP_4TB
>> Label: 'DUMBO_BACKUP_4TB'  uuid: 50651b41-bf33-47e7-8a08-afbc71ba0bf8
>>         Total devices 2 FS bytes used 3.35TiB
>>         devid    1 size 7.00TiB used 3.64TiB path /dev/sdd1
>>         devid    2 size 7.00TiB used 3.63TiB path /dev/sdc1
>>
>> root dumbo:/root #

Not sure why one of the devices has 3.64TiB used, the other one 3.63TiB.

>> root dumbo:/root # btrfs filesystem usage /mnt/DUMBO_BACKUP_4TB
>> Overall:
>>     Device size:                  14.00TiB
>>     Device allocated:              7.27TiB
>>     Device unallocated:            6.73TiB
>>     Device missing:                  0.00B
>>     Used:                          6.69TiB
>>     Free (estimated):              3.48TiB      (min: 3.48TiB)
>>     Data ratio:                       2.00
>>     Metadata ratio:                   2.00
>>     Global reserve:              512.00MiB      (used: 0.00B)
>>
>> Data,single: Size:1.00GiB, Used:0.00B
>>    /dev/sdd1       1.00GiB
>>
>> Data,RAID1: Size:3.36TiB, Used:3.24TiB
>>    /dev/sdc1       3.36TiB
>>    /dev/sdd1       3.36TiB
>>
>> Data,DUP: Size:13.50MiB, Used:2.81MiB
>>    /dev/sdd1      27.00MiB
>>
>> Metadata,single: Size:1.00GiB, Used:0.00B
>>    /dev/sdd1       1.00GiB
>>
>> Metadata,RAID1: Size:284.94GiB, Used:111.84GiB
>>    /dev/sdc1     284.94GiB
>>    /dev/sdd1     284.94GiB
>>
>> Metadata,DUP: Size:512.00MiB, Used:48.00KiB
>>    /dev/sdd1       1.00GiB
>>
>> System,single: Size:32.00MiB, Used:0.00B
>>    /dev/sdd1      32.00MiB
>>
>> System,RAID1: Size:32.00MiB, Used:560.00KiB
>>    /dev/sdc1      32.00MiB
>>    /dev/sdd1      32.00MiB
>>
>> Unallocated:
>>    /dev/sdc1       3.36TiB
>>    /dev/sdd1       3.36TiB
>> root dumbo:/root #





-- 
Johannes Kastl
Linux Consultant & Trainer
Tel.: +49 (0) 151 2372 5802
Mail: kastl@b1-systems.de

B1 Systems GmbH
Osterfeldstraße 7 / 85088 Vohburg
http://www.b1-systems.de
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