I apologize if this is documented elsewhere, but after some searching I'm still not sure what the best practice would be in this case:

My array configuration is 2 parity slots + 5 data slots, but I have removed the Parity 2 disk and checked/rebuilt parity. I want to switch to a new configuration with 1 parity slot + 6 data slots. How do I do that very safely?

Bonus question: if I later want to go from 1 parity slot + 6 data slots to 1 parity slot + 4 or 5 data slots, how would I proceed?

Thanks for any hints!

Attach Diagnostics ZIP to your NEXT post in this thread.

1 hour ago, nanoserver said:

I have removed the Parity 2 disk

Do you mean it is no longer connected?

15 hours ago, nanoserver said:

I want to switch to a new configuration with 1 parity slot + 6 data slots. How do I do that very safely?

Skip this step if you want to go here:

15 hours ago, nanoserver said:

Bonus question: if I later want to go from 1 parity slot + 6 data slots to 1 parity slot + 4 or 5 data slots, how would I proceed?

As I recall, if you stop the array, physically remove a parity disk and restart the array, Unraid will automatically become a single parity system. (PS-- It is better to remove Parity2 than Parity1 as the math for Parity2 is a very complex math operation!)

Edited February 6Feb 6 by Frank1940
"better to remove Parity2 than Parity1" was "better to remove Parity1 than Parity2 ". (Not completely awake this morning...

1 hour ago, Frank1940 said:

. (PS-- It is better to remove Parity1 than Parity2 as the math for Parity2 is a very complex math operation!)

I would have said the opposite. You want to keep parity1 as it’s calculation puts less load on the system.