Array won't start and it looks like some pool config changes are happening during the upgrade. Can anyone assist?

Array won't start after upgrade but will again after downgrade back to 7.1.4. Steps taken...deleted empty cache pool. Changed array pool sizes to try to get rid of the three unassigned devices, but it won't let me change to anything lower than 5 disks in the pool, and I can't remove the unassigned cache disk no matter what I do.

7.1.4 pool config:

Post upgrade to 7.2.4 error message:

Post upgrade array config:

nas-diagnostics-20260419_0816.zip

I don't see any disks that you might assign to any pools outside the array. Did you have any before?

Nope. Just the same 4 disks...3 in the pool and 1 for parity. The same thing happened when I tried to upgrade to an earlier version of 7.2 and I downgraded back thinking it was a bug.

4 hours ago, LarryW said:

Nope. Just the same 4 disks...3 in the pool and 1 for parity. The same thing happened when I tried to upgrade to an earlier version of 7.2 and I downgraded back thinking it was a bug.

When you say "3 in the pool" then I assume you mean the main Unraid array (which is what your screenshot says). Note that the term 'pool' in Unraid has a special meaning for disks that are not part of the main Unraid array. If that is the case you need to remove the 'cache' and 'pool' pools as they do not have any drives assigned where your screenshot suggest they should have one each.

You cannot have pools without a device assigned; click on those pools and then "remove pool"

5 hours ago, JorgeB said:

You cannot have pools without a device assigned; click on those pools and then "remove pool"

I did not put those two pool disks in. My original version did way back when I think.

So younare saying if I remove cache and pool from "pool devices I should be good? What about the three in the array devices that are unassigned after the upgrade (that don't exist?)

Edited April 20Apr 20 by LarryW

9 minutes ago, LarryW said:

So younare saying if I remove cache and pool from "pool devices I should be good?

Yep

10 minutes ago, LarryW said:

What about the three in the array devices that are unassigned after the upgrade (that don't exist?)

Number of array slots doesn't matter for this.

4 hours ago, JorgeB said:

Yep

Number of array slots doesn't matter for this.

I will give it a shot and report back.

14 hours ago, JorgeB said:

You cannot have pools without a device assigned; click on those pools and then "remove pool"

That fixed it. That means those were hanging around since my first version (I think it was v4 or v5) and never caused an issue.

Thank you for the assist.