Hi,

I started my server after a powerless (clean shutdown on UPS) and my cache drives are now giving me an error:

Any help on clearing these errors would be appreciated. I looked at some other threads and had a hard time following what was going on.

Logs attached.

Thanks.

tower-diagnostics-20231130-2252.zip

And I cant mount external drives. They don't show up.

The diags you posted don't match the screenshot; the cache pool has a single NVMe device. Which one is it?

Um I am not sure. I had both drives as cache for a while. When I started the server, I think it came up without the cache pool- a lot of my dockers needed to be reconfigured. I only noticed the issue when I tried to mount an external drive. I re-ran the logs.

lexicon-diagnostics-20260907-1232.zip

This server is named lexiconm, previous diags were from a server named tower.

These do have that pool, but no btrfs filesystem is being found

post the output from btrfs fi show

root@Lexicon:~# btrfs fi show
Label: none  uuid: 1aa29c5e-af06-4b79-9eed-27d2078e804b
        Total devices 1 FS bytes used 47.37GiB
        devid    1 size 150.00GiB used 65.52GiB path /dev/loop2

Label: none  uuid: 82f6c9b0-466a-470e-b28e-d7feaa4731f1
        Total devices 1 FS bytes used 1.07MiB
        devid    1 size 1.00GiB used 238.38MiB path /dev/loop3
warning, device 2 is missing

Label: none  uuid: 685bc989-ecb9-45d4-930e-6e4aee0290df
        Total devices 2 FS bytes used 48.48GiB
        devid    1 size 465.76GiB used 71.03GiB path /dev/sdf1
        *** Some devices missing

There's a missing device, if the pool were redundant, you can try to import it degraded with the remaining one, for that:

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 1 slot

assign the remaining pool device (sdf), leave the filesystem set to auto

start the array to import the pool and post new diags

Donelexicon-diagnostics-20260907-1339.zip

The SSD appears to be failing; run an extended SMART test and post the result.

See attached. I can't seam to be able to run a smart test. The button flashes but nothing runs.
lexicon-smart-20260908-2207.zip

But I was able to run it on the other drive I used to have in the pool:

lexicon-smart-20260908-2209.zip

It does appear to be failing, you try try cloning it to a spare devicew, to see if it can copy enough data to rescue some:

https://forums.unraid.net/topic/46802-faq-for-unraid-v6/page/2/#findComment-525075

Sorry, I was traveling and only just got home. I don't have a spare device to test on. I don't think I need what was on the cache.

The server is currently running and doing everything I need it to- all my dockers are working and my data is available. Is there any reason I shouldn't format the Samsung drive and start using it as a cash pool and look at replacing the failing drive down the road?

Thanks!

Edited September 20Sep 20 by steep-greeter8755

If there's nothing there you need, you can reformat.

OK I reformatted and added it to the pool. Same issue.

lexicon-diagnostics-20260920-1111.zip

You should have added it to the pool then reformatted.

Now that it is in the pool try formatting it.

Still showing unmountable

lexicon-diagnostics-20260920-1227.zip

Looks like you are having connection problems with that drive. In fact, I don't even see a SMART report for that device, so it must have completely disconnected. Check connections, both ends, SATA and power, including splitters.