I recently built a new server and wanted to move my cache pool of 2 ssds to a new one of 2 NVMes. I first booted the server and started the array with just one of the 2 ssd installed. There was a lot of activity on the disk and I then went to stop the array. It told me there was a btrfs operation in progress and would not let me. So I waited for it to finish. Once finished I stopped the array and followed instructions here.

 

After following these instructions, if I recall correctly, nothing happened. I know that sounds bad, like I wasn't paying attention, but at this point I've tried so many things and what feels like an eternity has passed that I can't remember. So I then stopped the array yet again. I thought ok I'll just go back to the original ssd. When I picked it from the list it told me this device was wrong. I started the array anyways and it tells me it's unmountable.

 

I then tried all the commands here. Which all resulted in the following: 

mount: /temp: wrong fs type, bad option, bad superblock on /dev/sda1, missing codepage or helper program, or other error.
dmesg(1) may have more information after failed mount system call.

 

When running btrfs check --repair /dev/sda1 I get the following: 

Starting repair.
Opening filesystem to check...
No valid Btrfs found on /dev/sda1
ERROR: cannot open file system

 

Finally, I ran the command btrfs check -s 1 /dev/sda1 as suggested here and got the following: 

using SB copy 1, bytenr 67108864
Opening filesystem to check...
warning, device 2 is missing
Checking filesystem on /dev/sda1
UUID: 6e29690f-b1c4-44e7-82ea-69b91542a53f
[1/7] checking root items
[2/7] checking extents
[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)
found 79680425984 bytes used, no error found
total csum bytes: 37951400
total tree bytes: 188710912
total fs tree bytes: 75956224
total extent tree bytes: 55312384
btree space waste bytes: 37890887
file data blocks allocated: 389775470592
 referenced 70950273024

 

At this point I don't know what else to try. Before send ing this I did reboot the server and try all the commands but there was no change. I do still have both disks but at this point they've both been through the exact same processes.

 

Edit: I have just plugged in both SSDs and tried to mount the only mountable one by clicking mount with Unassigned Devices. I got the following: 

Feb  3 20:59:04 DuckyServer unassigned.devices: Mount of 'sdi1' failed: 'mount: /mnt/disks/WD-WCC4M0429617: mount(2) system call failed: Structure needs cleaning.        dmesg(1) may have more information after failed mount system call. '
Feb  3 20:59:04 DuckyServer unassigned.devices: Partition 'WD-WCC4M0429617' cannot be mounted.

AND IN THE LOG

[  665.697291] XFS (sdi1): Corruption detected. Unmount and run xfs_repair
[  665.697653] XFS (sdi1): log has mismatched uuid - can't recover
[  665.697657] XFS (sdi1): empty log check failed
[  665.697658] XFS (sdi1): log mount/recovery failed: error -117
[  665.697844] XFS (sdi1): log mount failed

 

duckyserver-diagnostics-20230203-2054.zip

Great news! I got it! I ran this command btrfs-select-super -s 1 /dev/sdj1 from here and was able to mount the disk! After mounting I just copied all the folders from it to my new cache pool, rebooted, and bam! Everything loaded up like before and was happy.