Hello all,
I had a recovery event a few days ago that completed, and as far as I
can tell, the array is clean.
root@xubuntu:/mnt/md0# mdadm -D /dev/mapper/vg0-lv0
/dev/mapper/vg0-lv0:
Version : 1.2
Creation Time : Mon Mar 30 19:44:30 2020
Raid Level : raid5
Array Size : 17571291136 (16757.29 GiB 17993.00 GB)
Used Dev Size : unknown
Raid Devices : 4
Total Devices : 4
Persistence : Superblock is persistent
Intent Bitmap : Internal
Update Time : Tue May 19 19:04:43 2020
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 128K
Name : TNAS-2CC8E6:UTOSUSER-X86-S64
UUID : cc80e7cd:c6b902c4:ef36b897:409e8f96
Events : 18518
Number Major Minor RaidDevice State
0 8 20 0 active sync /dev/sdb4
1 8 36 1 active sync /dev/sdc4
2 8 52 2 active sync /dev/sdd4
4 8 4 3 active sync /dev/sda4
I cannot mount it:
root@xubuntu:/mnt/md0# mount -t btrfs /dev/mapper/vg0-lv0 /mnt/md0/
mount: /mnt/md0: wrong fs type, bad option, bad superblock on
/dev/mapper/vg0-lv0, missing codepage or helper program, or other
error.
I cannot check it:
root@xubuntu:/mnt/md0# btrfsck /dev/mapper/vg0-lv0
bytenr mismatch, want=441707118592, have=0
Couldn't read tree root
ERROR: cannot open file system
I cannot mount it readonly with the backuproot option, either:
root@xubuntu:/mnt/md0# mount -t btrfs -o ro,usebackuproot
/dev/mapper/vg0-lv0 /mnt/md0/
mount: /mnt/md0: wrong fs type, bad option, bad superblock on
/dev/mapper/vg0-lv0, missing codepage or helper program, or other
error.
Please help :) I'd like to get some baby photos/vids out of that
array before I call it a lost cause. Some of the photos are for
babies that aren't here anymore, and they are all I have.
root@xubuntu:/mnt/md0# uname -a
Linux xubuntu 4.15.0-20-generic #21-Ubuntu SMP Tue Apr 24 06:15:38 UTC
2018 i686 i686 i686 GNU/Linux
root@xubuntu:/mnt/md0# btrfs --version
btrfs-progs v4.15.1
root@xubuntu:/mnt/md0# btrfs fi show
Label: none uuid: 9ef00e00-ea8a-4b29-b8b1-4ce6e85a7e7f
Total devices 1 FS bytes used 5.59TiB
devid 1 size 16.36TiB used 5.64TiB path /dev/mapper/vg0-lv0
## Note: I cannot mount the filesystem:
root@xubuntu:/mnt/md0# btrfs fi df /mnt/md0
ERROR: not a btrfs filesystem: /mnt/md0
Attachment:
dmesg.log
Description: Binary data
