April 30, 20251 yr I find myself in a very similar situation as the gentleman in this post: Unraid Support Post I migrated my cache pool from a 240 GB SSD to a 1TB NVME and now have an unassigned 240 GB device that, when removed, renders the 1TB NVME unmountable with the following: "Cache pool BTRFS missing device(s)" I didn't go quite as far as the guy in the previous post, so I'm looking for guidance on next steps before I dig the hole any deeper. I'm wondering if I can just backup the cache pool files, delete the pool, recreate it, and restore the files? bitthurmzunraid-diagnostics-20250429-2008.zip Edited May 1, 20251 yr by Sandstalker
April 30, 20251 yr Community Expert The pool is still made of both devices, I assume you want to remove sdd?
April 30, 20251 yr Community Expert Solution With the array running type: btrfs balance start -f -mconvert=dup /mnt/cache then btrfs dev del 1 /mnt/cache Then post new diags.
April 30, 20251 yr Author @JorgeB, that looks to have worked. Waiting for your feedback: bitthurmzunraid-diagnostics-20250430-1624.zip When I attempted to upgrade UnRaid a year or so ago I ran into a similar issue with the cache drive being unrecognized and I had to roll back to v6.9.2. Could that have been the cause?
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