Hello, after an unclean shutdown two of my disks were marked with red X's. I removed them from the array, started and stopped the array, then re-added so the data rebuild could start. After it finished my disks are marked as "Unmountable: Not Mounted". I've tried several of the btrfs specific commands including rescue and --repair and they all fail immediately with an error like:

 

ERROR: superblock checksum mismatch
ERROR: superblock checksum mismatch
ERROR: superblock checksum mismatch
ERROR: superblock checksum mismatch
No valid Btrfs found on /dev/sdi1

 

I then tried removing both from the array again, and using the UD plugin, but the fail to mount immediately and it doesn't look like anything makes it to the logs. The only thing I've learned from my googling is to not use btrfs for data disks in the future

 

Now, I am still a bit new to unraid so I'll mention a change I made maybe a week before this. I had two 6tb disks for parity, I plan on moving my array to 14tb disks and got my first one in so I removed one of the 6TBs, added it to the array and formatted it, then added the 14tb as a parity drive. All seemed to be working well after a parity sync so I left it at that, I did not run "New Config" or anything else after, I'm not sure if I'm supposed to do that after or not. Like I said I'm still a bit new so please let me know if there are any relevant logs (EDIT: See attached) you'd like to take a look at, one of the unmountable drives has losable data, but the other has all my important data. Thank you.

svrunrwx-diagnostics-20210413-1900.zip

Edited April 14, 20215 yr by ElementBreaker
added diag

7 hours ago, ElementBreaker said:

After it finished my disks are marked as "Unmountable: Not Mounted".

They would already be unmountable before rebuilding, if the emulated disks aren't mounting (and can't be fixed) rebuilding on top of the old disks is not the best solution, there are some recovery options here but they might not help in this case.