Hello,
The power to my computer was suddenly cut, one of my btrfs fs (not the
root) has somewhat disappeared, I can't mount it or use any of the
available btrfs tools on it.
Here's some command output:
[root@archpc ~]# fdisk -l /dev/sdb
Disk /dev/sdb: 808.9 GB, 808888614912 bytes, 1579860576 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000db8c9
Device Boot Start End Blocks Id System
/dev/sdb1 63 1567571967 783785952+ 83 Linux
/dev/sdb4 1567571968 1579859967 6144000 82 Linux swap / Solaris
/dev/sdb1 is the lost btrfs fs.
[root@archpc ~]# btrfs-find-root -v /dev/sdb1
No valid Btrfs found on /dev/sdb1
[root@archpc ~]# btrfsck /dev/sdb1
No valid Btrfs found on /dev/sdb1
[root@archpc ~]# mount /dev/sdb1 /mnt/restore/
mount: wrong fs type, bad option, bad superblock on /dev/sdb1,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so
[ 1767.655429] JBD2: no valid journal superblock found
[ 1767.655432] EXT4-fs (sdb1): error loading journal
If you need anymore information please ask.
Thanks.
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