Hello,I'm testing btrfs RAID5 on three encrypted hdds (dm-crypt) and I'm simulating a harddisk failure by unplugging one device while writing some files. Now the filesystem is damaged. By now is there any chance to repair the filesystem?
My operating system is ubuntu server (vivid) with kernel 3.18 and btrfs 3.18.1 (external PPA). I've unplugged device sdb with UUID 65f62f63-6526-4d5e-82d4-adf6d7508092 and crypt device name /dev/mapper/crypt-1. This one should be repaired.
Attached is the dmesg log file with corresponding errors. btrfs check do not seem to work. # btrfs check --repair /dev/mapper/crypt-1 enabling repair mode Checking filesystem on /dev/mapper/crypt-1 UUID: 504c2850-3977-4340-8849-18dd3ac2e5e4 checking extents Check tree block failed, want=165396480, have=5385177728513973313 Check tree block failed, want=165396480, have=5385177728513973313 Check tree block failed, want=165396480, have=65536 Check tree block failed, want=165396480, have=5385177728513973313 Check tree block failed, want=165396480, have=5385177728513973313 read block failed check_tree_block Check tree block failed, want=165740544, have=6895225932619678086 Check tree block failed, want=165740544, have=6895225932619678086 Check tree block failed, want=165740544, have=65536 Check tree block failed, want=165740544, have=6895225932619678086 Check tree block failed, want=165740544, have=6895225932619678086 read block failed check_tree_block Check tree block failed, want=165756928, have=13399486021073017810 Check tree block failed, want=165756928, have=13399486021073017810 Check tree block failed, want=165756928, have=65536 Check tree block failed, want=165756928, have=13399486021073017810 Check tree block failed, want=165756928, have=13399486021073017810 read block failed check_tree_block Check tree block failed, want=165773312, have=12571697019259051064 Check tree block failed, want=165773312, have=12571697019259051064 Check tree block failed, want=165773312, have=65536 Check tree block failed, want=165773312, have=12571697019259051064 Check tree block failed, want=165773312, have=12571697019259051064 read block failed check_tree_block Check tree block failed, want=165789696, have=4069002570438424782 Check tree block failed, want=165789696, have=4069002570438424782 Check tree block failed, want=165789696, have=65536 Check tree block failed, want=165789696, have=4069002570438424782 Check tree block failed, want=165789696, have=4069002570438424782 read block failed check_tree_block Check tree block failed, want=165838848, have=9612508092910615774 Check tree block failed, want=165838848, have=9612508092910615774 Check tree block failed, want=165838848, have=65536 Check tree block failed, want=165838848, have=9612508092910615774 Check tree block failed, want=165838848, have=9612508092910615774 read block failed check_tree_block ref mismatch on [99516416 16384] extent item 1, found 0 failed to repair damaged filesystem, aborting Trying a btrfs scrub is finishing with uncorrectable errors:# btrfs scrub start -d /dev/mapper/crypt-1 scrub started on /dev/mapper/crypt-1, fsid 504c2850-3977-4340-8849-18dd3ac2e5e4 (pid=2014)
# btrfs scrub status -d /mnt/data/ scrub status for 504c2850-3977-4340-8849-18dd3ac2e5e4 scrub device /dev/mapper/crypt-1 (id 1) historyscrub started at Mon Jan 26 14:36:57 2015 and finished after 617 seconds
total bytes scrubbed: 29.78GiB with 10906 errors
error details: csum=10906
corrected errors: 0, uncorrectable errors: 10906, unverified
errors: 0
scrub device /dev/mapper/crypt-2 (id 2) no stats available scrub device /dev/mapper/crypt-3 (id 3) no stats availableAny chance to fix the errors or do I have to wait for the next btrfs version?
Thank you very much, Alexander # uname -aLinux antares 3.18.0-9-generic #10-Ubuntu SMP Mon Jan 12 21:41:54 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
# btrfs --version
Btrfs v3.18.1
# btrfs fi show
Label: 'antares-data' uuid: 504c2850-3977-4340-8849-18dd3ac2e5e4
Total devices 3 FS bytes used 89.35GiB
devid 1 size 698.63GiB used 47.03GiB path /dev/mapper/crypt-1
devid 2 size 698.63GiB used 47.01GiB path /dev/mapper/crypt-2
devid 3 size 698.63GiB used 47.01GiB path /dev/mapper/crypt-3
# btrfs fi df /mnt/data/
Data, single: total=8.00MiB, used=0.00B
Data, RAID5: total=92.00GiB, used=89.25GiB
System, single: total=4.00MiB, used=0.00B
System, RAID5: total=16.00MiB, used=16.00KiB
Metadata, single: total=8.00MiB, used=0.00B
Metadata, RAID5: total=2.00GiB, used=100.44MiB
GlobalReserve, single: total=48.00MiB, used=0.00B
dmesg.log.gz
Description: application/gzip
smime.p7s
Description: S/MIME Cryptographic Signature
