Help on how to remove first cache drive without losing data

[smilespray]

I have read all kinds of support posts here, but I'm stuck.

 

Here's my issue.

 

I used to have two cache NVMe drives in my RAID1 cache pool, the first being 1TB and the second being 2TB with RAM.

I physically removed the first drive and rebooted  as I wanted the full 2TB capacity available. In my setup I don't have the need for cache redundancy.

 

After removing the first 1TB drive and rebooting, some rebalancing (don't quote me on this) started and finished.

 

Currently my UNRAID setup works fine, but I my first cache slot show as "Not installed". When I reboot, I have to manually start the array to get everything online.

 

So: My wish is for the first cache slot disappear. If I stop the array and try to reassign the second "Cache 2" drive into the slot "Cache" says that the drive will be erased. This makes me afraid. I am unable to change the number of slots to 1 — the lowest number available is 2.

 

Screenshot of my setup:

https://imgur.com/a/fnslUrZ

 

I also have a diagnostics zip available but don't know how to upload.

 

 

[smilespray]

Here are the diagnostics!

notflix-nu-diagnostics-20240810-1431.zip

[Andiroo2]

My understanding is that you have to stop the array, move the 2TB drive into slot 1 in the pool config (remove from slot 2 and select in slot 1) and then select ‘None’ for slot 2, then start the array.  

 

It would be good to someone to validate this though, I’ve only done this once recently.

 

EDIT: Forgot the step of starting the array with NO cache drives present…see @JorgeB’s post.

Edited August 11 by Andiroo2
Solution identified

[JorgeB]

Stop the array, unassign the cache device, start the array, stop the array, set pool slots to 1, re-assign the device, start the array.

[smilespray]

7 hours ago, JorgeB said:

Stop the array, unassign the cache device, start the array, stop the array, set pool slots to 1, re-assign the device, start the array.

Thanks!