This is still the problem, you can try to mount it read-only and copy the data elsewhere, then reformat, see the 1st option below:

https://forums.unraid.net/topic/46802-faq-for-unraid-v6/page/2/#findComment-543490

@JorgeB Thanks so much for your help. I'm obviously not well versed on all of this.

In my case, would the command from the FAQ be the following since this is the 1 TB drive that is full (I didn't see an sdX indicator for the drive)?

mount -o rescue=all,ro /dev/nvmen1n1 /temp

Since they are in a pool, you can use nvme0n1 or nvme1n1, but you must specify the partition, p1 at the end, e.g.:

mount -o rescue=all,ro /dev/nvmen1n1p1 /temp

@JorgeB Thanks! I was able to copy the files to an external drive.

I rebooted into normal mode and started the array. Both nvme drives were shown as unmountable and the option to format them was available. When I clicked the "Yes, I want to do this" checkbox in the Format section and got this warning about updating the parity. I thought the parity was unaffiliated with the cache pool.

Edited November 22, 2025Nov 22 by rockbox948

It is not affected, it's just a general warning, if the pool is the only unmountable, only that will be formatted.

@JorgeB Perfect! The cache pool is back and at 3TB. Is there anything else I should do before moving my domains and appdata folders back to the cache?

If the pool was reformatted, it should be OK to move the data back

@JorgeB Thanks so much for all of your help with this. I am back up and running, my data was not lost, and the issue with the docker page not loading has been resolved!