Unmountable: Unsupported partition layout

[dhomas]

Hello all!

 

I am having a problem that I don't know how to resolve. I had an array of 2 x 22TB parity drives and 4 data drives: 2 x 16TB, 1 x 22TB, and 1 x 20TB. I wanted to add a 5th data drive, an 18TB, to the array. I performed the preclear on the new drive, all completed successfully with no errors (pre-read, preclear, post-read). 

I then stopped the array, added the new drive (Disk 5) to the array and started it up again. When I started it, Disk 4 (which already has data on it) and Disk 5 showed up as "Unmountable: Unsupported partition layout". See below:

 

 

I do not want to lose the data on Disk 4. Disk 5 is new, so I don't care if I need to format it again. How should I proceed? Thank you for any help you can provide.

 

Edit: added diagnostics.

 

Regards,

 

Dhomas

undom-diagnostics-20240314-0819.zip

Edited March 14 by dhomas
Added context

[JorgeB]

Looks like the new parition for disk4 requires a reboot to be updated, please reboot and post new diags after array start.

[dhomas]

Phew! A reboot seems to have fixed Disk 4. Disk 5 still appears as Unmountable. I suppose I should just format that one.

Edited March 14 by dhomas
typo

[JorgeB]

4 minutes ago, dhomas said:

I suppose I should just format that one

Yep.

[dhomas]

After a format, the new drive is also functional. Thanks for your help! I'm learning unraid, so these types of small issues still make me a little skittish. I'll mark your post as a solution. However, my understanding is that it should not be necessary to reboot for these types of array operations, provided my drives are already physically installed. Any clue as to what made the previously functional Disk 4 show up as Unmountable? So I can avoid these mini heart attacks in the future.  

[JorgeB]

22 minutes ago, dhomas said:

However, my understanding is that it should not be necessary to reboot for these types of array operations,

It should not, I've seen this before but cannot reproduce, I've been trying to, which tool did you use to preclear the disk?

[dhomas]

I used the Unassigned Devices Preclear plugin to preclear my Disk 5.