So that turned out to be the same issue also. This devolved into flash drive becoming read only and not booting anymore. I reflashed it, restored backup, and everything is actually working correctly this time. I have the original files from the flash drive if they would be helpful in figuring out what got corrupted if it wasn't just the flash drive itself

I don't see how ATA errors can be caused by the flash drive. I recommend using the server for some more time to confirm it's really resolved; it would also be good to look at the diags after a few days of uptime.

On 7/25/2026 at 12:43 AM, JorgeB said:

I don't see how ATA errors can be caused by the flash drive. I recommend using the server for some more time to confirm it's really resolved; it would also be good to look at the diags after a few days of uptime.

I don't either. But the reason I was messing with the server in the first place was reconfig and data migration. It got to the point of even throwing errors on my nvme drives and then the read only flash drive. But after the fresh flash drive, not a single issue. Well intel_gpu_top doesn't work but not too concerned with that. Now the drive configs are vastly different so can't say with 100% certainty that was the issue.

Edited July 27Jul 27 by jmztaylor

Well back again. Rebooted server and cache pool was gone. Ensured they were assigned in the correct locations and getting unmountable and wanting to format the cache pool

tower-diagnostics-20260728-0918.zip

Let Unraid auto import 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 4 slots

assign the pool devices, leave the filesystem set to auto

start the array to import the pool

If that still doesn't mount post new diags.

50 minutes ago, JorgeB said:

Let Unraid auto import 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 4 slots

assign the pool devices, leave the filesystem set to auto

start the array to import the pool

If that still doesn't mount post new diags.

That did it. any idea what could be causing this seemingly random issues? Could it be a CPU issue? It was a clean reboot at least on my side.

The pool disappearing is more consistent with a flash drive issue, but not the disk issues IMO, so there could be more than one problem.

3 minutes ago, JorgeB said:

The pool disappearing is more consistent with a flash drive issue, but not the disk issues IMO, so there could be more than one problem.

I know from a technical side those previous ata errors couldn't have caused that but with this new issue would it be wise to just move to internal boot?

It may be worth a try, to rule out any flash/USB issues.

31 minutes ago, JorgeB said:

It may be worth a try, to rule out any flash/USB issues.

I tossed 2 nvme drives in there and moved to internal flash. Will monitor.