BTRFS error (device loop2) - in Syslog

[harshakavuri]

Hi,

I am having btrfs device  loop 2 errors.

May  5 09:50:20 HarshaUNRAID kernel: BTRFS error (device loop2): bdev /dev/loop2 errs: wr 45, rd 0, flush 0, corrupt 0, gen 0
May  5 09:50:20 HarshaUNRAID kernel: loop: Write error at byte offset 9176973312, length 4096.
May  5 09:50:20 HarshaUNRAID kernel: print_req_error: I/O error, dev loop2, sector 17923776

I had this error yesterday and I removed the docker.img and recreated it. worked for a day and now I am getting the errors again. I also replaced the RAM from my desktop, thinking it was the fault.

 

Please help

[JorgeB]

Please post the diagnostics: Tools -> Diagnostics

[harshakavuri]

diagnostics attached

harshaunraid-diagnostics-20200505-1012.zip

[JorgeB]

Cache filesystem is corrupt, best bet is to backup, re-format and then restore the data.

[harshakavuri]

Could you tell me the procedure for reformatting the cache drive.

 

Thanks a lot for the help.

[JorgeB]

Easiest way is to clear it with blkdiskcard (after the backup is done)

-stop array

blkdiscard /dev/nvme0n1

-start array

-there will be an option to format the cache

[harshakavuri]

I am in the process of making a backup of cache. Once done i will use the command,

 

and once again thanks for the help.