Issue with the cache pool drives / btrfs filessystem unmountable

[EinfachToll]

Hi there,

this morning my server shows that the filessystem from the cache pools is unmountable.
In the array maintanance mode I done the brtrfs check from the gui with this result:
 

Quote

 

[1/7] checking root items

[2/7] checking extents data extent[1557454716928, 4096] referencer count mismatch (root 5 owner 36971 offset 2959822848) wanted 0 have 1 data extent[1557454716928, 4096] bytenr mimsmatch, extent item bytenr 1557454716928 file item bytenr 0 data extent[1557454716928, 4096] referencer count mismatch (root 65541 owner 36971 offset 2959822848) wanted 1 have 0 backpointer mismatch on [1557454716928 4096] ERROR: errors found in extent allocation tree or chunk allocation

[3/7] checking free space tree

[4/7] checking fs roots

[5/7] checking only csums items (without verifying data)

[6/7] checking root refs

[7/7] checking quota groups skipped (not enabled on this FS) Opening filesystem to check... Checking filesystem on /dev/sdc1 UUID: 832f2c25-defe-4d68-80e1-2d9e8545fa35 found 348794531840 bytes used, error(s) found total csum bytes: 315368728 total tree bytes: 681279488 total fs tree bytes: 244301824 total extent tree bytes: 53100544 btree space waste bytes: 122260750 file data blocks allocated: 906466258944 referenced 343156350976

 

Now I cant mount the cache pool with all my data and docker configs on it. Any idea to get this back working?

 

Thanks. BR ET

Edited June 24 by EinfachToll

[JorgeB]

Please post the diagnostics.
 

[EinfachToll]

server-diagnostics-20240624-1336.zip

[JorgeB]

If the log tree is the only issue this may help:

 

btrfs rescue zero-log /dev/sdc1

 

Then re-start the array

[EinfachToll]

I was able to backup all data from the pool with this comand --> btrfs restore -v /dev/sdc1 /mnt/user/Backup/POOLBACKUP

 

shall i now try your command?

 

[JorgeB]

Yep.

[EinfachToll]

Sorry, with array off, on or in maintanace mode? @JorgeB

Edited June 24 by EinfachToll

[JorgeB]

In this case it doesn't matter, it can even be done with the array in normal mode, since the fs is not mounted.

[EinfachToll]

Array is back online. Thanks hope this is fixed now. Thank you!

[EinfachToll]

Hi, i still have massive issues, now the docker container wont start anymore and in the system protocoll i see a lot of BTRFS issues...

 

 

server-diagnostics-20240624-1703.zip

[itimpi]

loop2 is where the docker.img file gets mounted so that suggests its contents are corrupt.  It could also be by-product of the pool containing it being corrupt.

 

You should consider deleting it; recreating a new empty file and then reloading its contents via Apps->Previous Apps.

[EinfachToll]

Whatever I do it shows allways readonly filesystem... What can I do now?

 

[JorgeB]

That suggests the pool filesystem has other issues, suggest that you backup and then re-format.