Administrace komentářů

Ahoj, na mém telefonu Jolla začala chcípat baterka. Párkrát to lehlo natvrdo a teď nenastartuje vůbec. Dostal jsem se do recovery modu, je nějak nakopnutý btrfs. Překopíroval jsem device na kterém je filesystém na normální PC - Centos 7 (zkoušel jsem to i na live Fedora 31). Btrfs na PC nepoužívám, takže se tím prokousávám. Pomocí btrfs restore jde data vykopírovat. Ale zatím jsem nedokázal ten fs opravit.

Tady jsou mé, zatím marné pokusy. Příkazem btrfs zero-log jsem se trochu posunul, už to jde namoutovat, ale pouze RO. Chtěl jsem tedy přidat nějaký prostor, ale to mi zas píše, že je jen pro čtení.

~ # losetup --find --show /home/jirka/tmp/jolla.img
/dev/loop0

~ # btrfs fi show
Label: 'sailfish'  uuid: 86180ca0-d351-4551-b262-22b49e1adf47
	 Total devices 1 FS bytes used 4.73GiB
	 devid    1 size 13.75GiB used 13.75GiB path /dev/loop0

~ # mount -t btrfs /dev/loop0 ~/mnt
mount: /dev/loop0: can't read superblock

~ # mount -t btrfs -o usebackuproot /dev/loop0 ~/mnt
mount: /dev/loop0: can't read superblock

~ # btrfs rescue super-recover /dev/loop0
All supers are valid, no need to recover

/ # btrfs check /dev/loop0
Checking filesystem on /dev/mmcblk0p28
UUID: 86180ca0-d351-4551-b262-22b49e1adf47
checking extents
checking free space cache
checking fs roots
checking csums
checking root refs
checking quota groups
Counts for qgroup id: 264 are different
our:            referenced 876449792 referenced compressed 876449792
disk:           referenced 876449792 referenced compressed 876449792
our:            exclusive 872464384 exclusive compressed 872464384
disk:           exclusive 4096 exclusive compressed 4096
diff:           exclusive 872460288 exclusive compressed 872460288
Counts for qgroup id: 265 are different
our:            referenced 73646080 referenced compressed 73646080
disk:           referenced 73646080 referenced compressed 73646080
our:            exclusive 15380480 exclusive compressed 15380480
disk:           exclusive 4096 exclusive compressed 4096
diff:           exclusive 15376384 exclusive compressed 15376384
found 2841431300 bytes used err is 0
total csum bytes: 4715584
total tree bytes: 235204608
total fs tree bytes: 214499328
total extent tree bytes: 12795904
btree space waste bytes: 70058462
file data blocks allocated: 4970160128
 referenced 4793737216

~ # btrfs rescue zero-log /dev/loop0
parent transid verify failed on 94920704 wanted 2727500 found 2727499
parent transid verify failed on 94920704 wanted 2727500 found 2727499
parent transid verify failed on 94920704 wanted 2727500 found 2727499
parent transid verify failed on 94920704 wanted 2727500 found 2727499
Ignoring transid failure
Clearing log on /dev/loop0, previous log_root 94920704, level 0

~ # btrfs rescue zero-log /dev/loop0
Clearing log on /dev/loop0, previous log_root 0, level 0

~ # mount -t btrfs /dev/loop0 ~/mnt
mount: mount /dev/loop0 on /root/mnt failed: No space left on device

~ # mount -t btrfs -o ro /dev/loop0 ~/mnt

~ # btrfs fi df ~/mnt
Data, single: total=13.08GiB, used=4.51GiB
System, DUP: total=8.00MiB, used=4.00KiB
System, single: total=4.00MiB, used=0.00B
Metadata, DUP: total=330.00MiB, used=224.30MiB
Metadata, single: total=8.00MiB, used=0.00B
GlobalReserve, single: total=512.00MiB, used=406.37MiB

~ # truncate --size=2GB ~/tmp/space
~ # losetup --find --show ~/tmp/space
/dev/loop1

~ # btrfs device add /dev/loop1 ~/mnt/
Performing full device TRIM /dev/loop1 (1.86GiB) ...
ERROR: error adding device '/dev/loop1': Read-only file system