Unable to write to cache - Drive mounted read-only or completely full

[soana]

After a reboot today of the server I got the message above.

Cache drive seems to be only half full based on the report on the Main tab.

Error message:

Nov 28 17:54:51 Tower kernel: BTRFS error (device sdg1): parent transid verify failed on 495321088 wanted 1852238 found 1852237
Nov 28 17:54:51 Tower kernel: BTRFS: error (device sdg1) in __btrfs_free_extent:6989: errno=-5 IO failure
Nov 28 17:54:51 Tower kernel: BTRFS info (device sdg1): forced readonly
Nov 28 17:54:51 Tower kernel: BTRFS: error (device sdg1) in btrfs_run_delayed_refs:3009: errno=-5 IO failure
Nov 28 17:54:51 Tower shfs: error: shfs_rename: Read-only file system (30): rename: /mnt/cache/appdata/plex/Library/Application Support/Plex Media Server/Logs/PMS Plugin Logs/com.plexapp.agents.subzero.log.4 /mnt/cache/appdata/plex/Library/Application Support/Plex Media Server/Logs/PMS Plugin Logs/com.plexapp.agents.subzero.log.5
Nov 28 17:54:51 Tower kernel: BTRFS error (device sdg1): pending csums is 217088

Making a copy of the cache drive right now and will try next:

1. reset the cache drive cables

2. reformat the cache drive if above fails.

tower-diagnostics-20171128-1822.zip

[JorgeB]

22 minutes ago, soana said:

parent transid verify failed on 495321088 wanted 1852238

 

That's usually fatal with btrfs, copy everything and re-format, don't stop the array before copying everything as it can go unmountable, though you could use btrfs restore in that case.

[soana]

Thanks for the "glove" John!

The cables did not seem to have an influence so I moved to reformatting the cache drive, after about 10 hours of file transferring I'm back in business. 

Plex folder is a monster took me hours to transfer back and forth.