On 2017年10月04日 07:32, Asif Youssuff wrote:
Hi,
My power went out at my home, and I'm now having trouble mounting my array.
I'm mounting with the 'recovery' option in fstab.
When mounting, dmesg output shows:
[210017.281912] BTRFS info (device sdb): disk space caching is enabled
[210017.281915] BTRFS info (device sdb): has skinny extents
[210017.402084] BTRFS error (device sdb): super_total_bytes 92017859088384
mismatch with fs_devices total_rw_bytes 92017859094528
One of your device size is not aligned to 4K.
Which is fine, but recently enhanced validation checker does not allow it.
(Which should be a regression, and there is some other WARN_ON related
to it)
[210017.402126] BTRFS error (device sdb): failed to read chunk tree: -22
[210017.461473] BTRFS error (device sdb): open_ctree failed
I've tried a few steps --
btrfs-chunk-recover, super-recover and I have run a btrfs check --repair
on two of the disks in the array (this takes a very long time, so I'm
hoping I don't have to run this on all of the disks).
I had run into this problem once before in the past, and I'm not sure
how I recovered from it; I may have simply rolled back the booted kernel
to escape the extra checks around this mismatch.
I'm at a loss for ideas and am running a btrfs-image so I can also
report an issue -- I'm not sure whether 'btrfs-image -c9 -t4 /dev/sdo
btrfs.image' is the right command to run if it is a multi-device array.
Any ideas would be helpful, and I am happy to provide further information.
root@ubuntu-server:~# uname -a
Linux ubuntu-server 4.14.0-041400rc2-generic #201709242031 SMP Mon Sep
25 00:33:13 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
You can rollback to an earlier kernel to mount the fs.
And manually find and resize the device with unaligned size:
# btrfs fi show -b
And check each device for its size:
Label: none uuid: 839ddcfa-5701-4437-aff3-bcb2a26ae6dd
Total devices 1 FS bytes used 397312
devid 1 size <<10737418240>> used 2172649472 path
/dev/mapper/data-btrfs
If it's not align, round it down to 4K, and resize it using devid:
# btrfs fi resize <devid>:<rounded_size> <mount_point>
All device must be rounded. And the command should finish almost in no time.
Then check if latest kernel can mount it.
I think it can be made as part of "btrfs check" to fix it.
(Although it should be handled by kernel well)
Thanks,
Qu
root@ubuntu-server:~# btrfs --version
btrfs-progs v4.13.1
root@ubuntu-server:~# btrfs fi show
Label: none uuid: 48ed8a66-731d-499b-829e-dd07dd7260cc
Total devices 13 FS bytes used 40.73TiB
devid 4 size 5.46TiB used 5.42TiB path /dev/sdo
devid 5 size 5.46TiB used 5.42TiB path /dev/sdn
devid 7 size 5.46TiB used 5.42TiB path /dev/sdc
devid 9 size 5.46TiB used 5.42TiB path /dev/sdk
devid 10 size 5.46TiB used 5.42TiB path /dev/sdj
devid 11 size 7.28TiB used 7.24TiB path /dev/sdd
devid 12 size 5.46TiB used 5.42TiB path /dev/sdm
devid 14 size 7.28TiB used 7.24TiB path /dev/sdh
devid 15 size 7.28TiB used 7.24TiB path /dev/sdb
devid 17 size 7.28TiB used 5.77TiB path /dev/sdl
devid 18 size 7.28TiB used 7.24TiB path /dev/sdf
devid 20 size 7.28TiB used 7.24TiB path /dev/sdi
devid 21 size 7.28TiB used 7.24TiB path /dev/sdg
Thanks,
Asif
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