I've been using Unraid for a very long time, but have never run a cache drive.  As I was deprecating some old hard drives, I decided I wanted to give this a shot.  I'm getting an error in the UI that says "Unmountable: Unsupported or no file system".  I do see the section at the bottom of the main page that says "Unmountable disks present" and there is the "Yes I want to do this" box alongside the format button, which I tried, but even after that happens the drives still show the same error.  It's not clear what I'm doing wrong.  Does anything stick out?

 

The process I followed:

1. Got former array drives out of the array and got the array back in good shape
2. Precleared former array drives (primarily as an integrity check)
3. Stopped the array
4. Increased the cache slot size to 2 to enable direct mirroring
5. Added precleared drives to cache slots 1 and 2
6. Started the array
7. At the bottom of the main page, clicked the "yes I want to do this" and the "Format button
8. Verified the errors and state still exist

 

I think I then repeated steps 3-8 a second time, with the same result.

 

Running 6.12.6.

 

hyperion-diagnostics-20240115-0949.zip

Edited January 15, 20242 yr by Gizmotoy

Jan 15 09:39:21 Hyperion root: Warning: The kernel is still using the old partition table.
Jan 15 09:39:21 Hyperion root: The new table will be used at the next reboot or after you

Reboot and try again.

Ah, tricky.  I did not see that in the log.  I was hunting using the words "format" and "cache".

 

This was exactly it, though, after a reboot everything is working correctly.  Thank you!