Hallo to all of you,
and sorry for asking the very specialists directly,
but I found no useful answer to my problem.
my btrfs-filesystem is corrupt and can not be mounted==>
btrfsprogs v5.1 and btrfsprogs v4.15.1
# btrfs check /dev/dm-2
ERROR: tree block bytenr 0 is not aligned to sectorsize 4096
BUT btrfsprogs v4.4 can at least check the filesystem and I have (limited)
access to it. Still can not mount ...
I would appreciate it very much, if someone could give me a hint,
marcos k.
======= output ============= output =============
lap13:~ # uname -a
Linux ernnb113 5.1.5-1-default #1 SMP Mon May 27 07:14:33 UTC 2019 (6ad4f79) x86_64 x86_64 x86_64 GNU/Linux
lap13:~ # btrfs --version
btrfs-progs v5.1
lap13:~ # btrfs fi show
Label: 'rootfs' uuid: 0fe9bec5-fd4e-4a4b-a855-b0412d9916a4
Total devices 1 FS bytes used 134.48GiB
devid 1 size 310.13GiB used 143.06GiB path /dev/mapper/linuxvg-rootlv
Label: 'homefs' uuid: d3659317-3d28-42f0-beb3-2480fb2b0900
Total devices 1 FS bytes used 406.77GiB
devid 1 size 590.00GiB used 577.00GiB path /dev/mapper/linuxvg-homelv
lap13:~ # btrfs fi df /dev/dm-2
ERROR: not a btrfs filesystem: /dev/dm-2
lap13:~ # dmesg | grep -i btrfs
[ 7.485437] Btrfs loaded, crc32c=crc32c-intel, assert=on
[ 7.487711] BTRFS: device label rootfs devid 1 transid 3190209 /dev/dm-1
[ 7.616145] BTRFS info (device dm-1): disk space caching is enabled
[ 7.616148] BTRFS info (device dm-1): has skinny extents
[ 7.662371] BTRFS info (device dm-1): enabling ssd optimizations
[ 8.263761] BTRFS info (device dm-1): turning on discard
[ 8.263763] BTRFS info (device dm-1): disk space caching is enabled
[ 8.998829] BTRFS info (device dm-1): device fsid 0fe9bec5-fd4e-4a4b-a855-b0412d9916a4 devid 1 moved old:/dev/mapper/linuxvg-rootlv new:/dev/dm-1
[ 8.999507] BTRFS info (device dm-1): device fsid 0fe9bec5-fd4e-4a4b-a855-b0412d9916a4 devid 1 moved old:/dev/dm-1 new:/dev/mapper/linuxvg-rootlv
[ 10.484594] BTRFS: device label homefs devid 1 transid 2087298 /dev/dm-2
[ 10.520725] BTRFS info (device dm-2): turning on discard
[ 10.520728] BTRFS info (device dm-2): disk space caching is enabled
[ 10.520730] BTRFS info (device dm-2): has skinny extents
[ 10.522139] BTRFS critical (device dm-2): corrupt node: root=3 block=16384 slot=0, invalid NULL node pointer
[ 10.523238] BTRFS error (device dm-2): failed to read chunk root
[ 10.545271] BTRFS error (device dm-2): open_ctree failed
lap13:~ # btrfs check /dev/dm-2
ERROR: tree block bytenr 0 is not aligned to sectorsize 4096
Couldn't read chunk tree
ERROR: cannot open file system
Opening filesystem to check...
lap13:~ # btrfs rescue super-recover /dev/dm-2
All supers are valid, no need to recover
lap13 :~ # btrfs rescue chunk-recovery /dev/dm-2
Scanning: DONE in dev0
Check chunks successfully with no orphans
Chunk tree recovered successfully
lap13:~ # btrfs check /dev/dm-2
ERROR: tree block bytenr 0 is not aligned to sectorsize 4096
Couldn't read chunk tree
ERROR: cannot open file system
Opening filesystem to check...
