Hello all. I was installing a new disk in my "main" array and in the process must have unseated one of the cables on my cache pool drives. I am an idiot and tried to "fix" the cache pool by removing the disconnected drive from the pool (in the Unraid UI) -- I deleted and recreated the cache pool several times (I thought this would be a temporary fix and that the cache would work with only one drive, but it didn't). I re-seated all the cables and the drives are back to "normal," but Unraid won't mount the cache pool in the UI. I used Google and was able to mount the cache drive via CLI and am currently copying the files off to my main array, but someone suggested on Reddit that I should check here to see if there is a way to "force" Unraid to mount the pool.

I was/am running two SSDs on a BTRFS RAID1 configuration. I thought I had Unraid configured to sync the files to my main array, but I guess not. I'm not really worried about data loss at this point, but if there's a better way than just formatting the cache pool and copying the files back down, I'd appreciate the help / suggestions.

Thanks in advance.

nas-diagnostics-20260731-1355.zip

Edited July 31Jul 31 by mdb139

Attach Diagnostics ZIP to your NEXT post in this thread.

Edited the original post with the diagnostics. Thank you!

Try to reimport the pool:

on main click on the first device for that pool and then "remove pool"

back on main, create a new pool with the same name and 2 slots

assign the pool devices, leave the filesystem set to auto

start the array to import the pool

Then post new diags after array start.

P.S. syslog shows issues with the flash drive, you can try recreating it first.

On 7/31/2026 at 2:03 PM, mdb139 said:

Edited the original post with the diagnostics.

At least you did make a new post to tell us. If you had edited the original post, and no other post was made to the thread, then possibly nobody would have ever visited the thread again since had already been read. That is why I always say "NEXT post"

Thank you for looking. I ended up just copying the files from the cache drive to the array and back again. This prompted me to discover that I did not have cache configured the way I thought it was in the first place, as some files were intended for cache but were actually on the array... I think I'm in a much better spot now, independent of how I got there.

Post new diagnostics