Hi,
As the topic says, btrfs check - Couldn't open file system. Check runs fine
on all btrfs volumes except one - "Backup". There is nothing special
about it, it uses the same options as all the other ones (raid1, compress).
As you can see in the output below I double check the filesystem is unmounted,
and then try and check it (using a few different devices) but it won't work.
Checking another volume works fine.
There are no error or warning messages in dmesg.
Any ideas??
Thanks,
Paul.
IWT-VM ~ # uname -a
Linux IWT-VM 3.17.2-gentoo #1 SMP Mon Nov 3 15:46:50 AEDT 2014 x86_64 Intel(R)
Xeon(R) CPU E5-2620 0 @ 2.00GHz GenuineIntel GNU/Linux
IWT-VM ~ # mount
/dev/sdb2 on / type btrfs (rw,noatime,compress=zlib,ssd,noacl,space_cache)
/dev/sdh1 on /media/fast type btrfs (rw,noatime,ssd,noacl,space_cache)
/dev/sdg3 on /media/backup type btrfs
(rw,noatime,compress=zlib,noacl,space_cache)
/dev/sda1 on /media/data type btrfs (rw,noatime,compress=zlib,noacl,space_cache)
IWT-VM ~ # btrfs fi sh
Label: 'Root' uuid: 61f6ce80-6d05-414f-9f0f-3d540fa82f2e
Total devices 2 FS bytes used 6.58GiB
devid 4 size 60.00GiB used 18.03GiB path /dev/sdb2
devid 5 size 59.93GiB used 18.03GiB path /dev/sdi3
Label: 'Fast' uuid: c41dc6db-6f00-4d60-a2f7-acbceb25e4e7
Total devices 3 FS bytes used 396.85GiB
devid 1 size 471.93GiB used 416.02GiB path /dev/sdh1
devid 2 size 412.00GiB used 356.01GiB path /dev/sdi1
devid 3 size 163.57GiB used 108.01GiB path /dev/sdb1
Label: 'Backup' uuid: 92162be2-e52f-42fe-a9fd-da4f26c6abd1
Total devices 5 FS bytes used 2.74TiB
devid 6 size 891.50GiB used 822.00GiB path /dev/sdg3
devid 8 size 698.64GiB used 629.00GiB path /dev/sdd1
devid 9 size 891.51GiB used 821.03GiB path /dev/sde3
devid 10 size 2.73TiB used 2.66TiB path /dev/sdc1
devid 11 size 931.51GiB used 924.00GiB path /dev/sdf1
Label: 'Data' uuid: 89181f84-bace-43f8-9534-693f99c4d033
Total devices 2 FS bytes used 42.50GiB
devid 1 size 279.46GiB used 211.03GiB path /dev/sda1
devid 2 size 279.46GiB used 211.03GiB path /dev/sdj1
Btrfs v3.17
IWT-VM ~ # umount /media/backup
umount: /media/backup: not mounted
IWT-VM ~ # btrfs check /dev/sdg3
Couldn't open file system
IWT-VM ~ # btrfs check /dev/sdd1
Couldn't open file system
IWT-VM ~ # btrfs check /dev/sde3
Couldn't open file system
IWT-VM ~ # btrfs check /dev/sda1
Checking filesystem on /dev/sda1
UUID: 89181f84-bace-43f8-9534-693f99c4d033
checking extents
checking free space cache
checking fs roots
checking csums
checking root refs
found 38060448123 bytes used err is 0
total csum bytes: 44401072
total tree bytes: 110723072
total fs tree bytes: 50872320
total extent tree bytes: 9994240
btree space waste bytes: 12145264
file data blocks allocated: 45618331648
referenced 48120782848
Btrfs v3.17
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