Hi all, 

 

I'm new to unraid and had everything working smoothly with an 500gb ssd in a 1 slot cachepool. I discovered a 120gb SSD in an old laptop so I  added this to the cachepool. This wasnt working because both disks were 'not mountable'. I learned later that this might be due to the fact I added a smaller SSD than the previous one, so I tried to undo the added disk. This didnt work wel but after a few times spinning down the array and up again I could change it back to 1 slot again. 

 

My cachepool is 1 disk now, but I have error;

 

 unmountable: Wrong or no file system

 

I created no specific backups to rely on, but I didnt format the drive (and didnt do a mover-action, so I think there was about 200gb stored on this drive).

 

Is there any chance to get my data back?

 

Extra info: I also added a 2tb hdd to the main pool simultainously, that worked well. 

 

tower-diagnostics-20230104-2323.zip

No valid btrfs filesystem is being detected, are you sure the cache was btrfs before? If yes post the output of:

btrfs-select-super -s 1 /dev/sdf1

 

Thx for helping. 

 

The output is;

No valid Btrfs found on /dev/sdf1
ERROR: open ctree failed

 

But I think sdf1 points to the wrong (120gb) drive. Its the 500gb SSD i'm afraid off. The output of

 

btrfs-select-super -s 1 /dev/sdb1

 

and 

 

btrfs-select-super -s 1 /dev/sdb

 

Gives the same output. 

 

 

I see its xfs and figured it out. 

 

Steps I took;

1. Stop array

2. Removed disk from cachepool

3. Configured the cachepool for XFS. 

4. Placed the disk back in the cachepool. 

 

Thx for the help. 

Edited January 5, 20233 yr by hennio
extra info added.