Hello,
from this https://www.spinics.net/lists/linux-btrfs/msg57405.html
I still have damaged btrf file system (the partition was recovered.
Thanks Chris).
When mounting, I get:
[15681.255356] BTRFS info (device sda1): disk space caching is enabled
[15681.255690] BTRFS error (device sda1): bad tree block start 0
20987904
[15681.255786] BTRFS error (device sda1): bad tree block start 0
20987904
[15681.255805] BTRFS: failed to read chunk root on
So I ran chunk-recover (output below).
Total Chunks: 5
Recoverable: 0
Unrecoverable: 5
Is there anything else, I can do, or is that it?
Regards,
Hendrik
root@homeserver:~# btrfs rescue chunk-recover -v /dev/sda1
All Devices:
Device: id = 1, name = /dev/sda1
Scanning: DONE in dev0
DEVICE SCAN RESULT:
Filesystem Information:
sectorsize: 4096
leafsize: 16384
tree root generation: 22444670
chunk root generation: 233419
All Devices:
Device: id = 1, name = /dev/sda1
All Block Groups:
Block Group: start = 7776239616, len = 1073741824, flag = 1
Block Group: start = 61496885248, len = 536870912, flag = 24
Block Group: start = 62033756160, len = 536870912, flag = 24
Block Group: start = 71697432576, len = 1073741824, flag = 1
Block Group: start = 102835945472, len = 1073741824, flag = 1
All Chunks:
All Device Extents:
CHECK RESULT:
Recoverable Chunks:
Unrecoverable Chunks:
Chunk: start = 7776239616, len = 1073741824, type = 1, num_stripes = 0
Stripes list:
Block Group: start = 7776239616, len = 1073741824, flag = 1
No device extent.
Chunk: start = 62033756160, len = 536870912, type = 24, num_stripes = 0
Stripes list:
Block Group: start = 62033756160, len = 536870912, flag = 24
No device extent.
Chunk: start = 61496885248, len = 536870912, type = 24, num_stripes = 0
Stripes list:
Block Group: start = 61496885248, len = 536870912, flag = 24
No device extent.
Chunk: start = 71697432576, len = 1073741824, type = 1, num_stripes = 0
Stripes list:
Block Group: start = 71697432576, len = 1073741824, flag = 1
No device extent.
Chunk: start = 102835945472, len = 1073741824, type = 1, num_stripes =
0
Stripes list:
Block Group: start = 102835945472, len = 1073741824, flag = 1
No device extent.
Total Chunks: 5
Recoverable: 0
Unrecoverable: 5
Orphan Block Groups:
Orphan Device Extents:
Couldn't map the block 62034313216
No mapping for 62034313216-62034329600
Couldn't map the block 62034313216
bytenr mismatch, want=62034313216, have=0
Couldn't read tree root
open with broken chunk error
Chunk tree recovery failed
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