https://docs.unraid.net/legacy/FAQ/parity-swap-procedure/

 

I had 2x16TB drives and the non-parity failed. I replaced it with a 20TB drive and began the 'parity swap' process (the largest drive needs to be parity). I am/was at the end of step 14 (the parity copy had completed and ready to do 'The Start button will now be present, and the description will now indicate that it is ready to start a Data-Rebuild.'), but decided to shutdown to remove the dead drive and check on fans.

 

After reboot, "Array Operations" says 'Stopped. Upgrading disk/swapping parity.' and 'Copy' is greyed out (makes sense as it's already been copied).

 

Please help me get my array back online. Diagnostics attached.

 

Thanks.

unraid.aje1-diagnostics-20240706-1111.zip

You cannot stop the system during the Parity Swap procedure - it must run to completion without interruption.   You will need to restart from the beginning.

Not sure if that's true (or even how to restart the process), I found this thread which seems very similar.

 

 

Post a screenshot of Main - Array Operation

Attached. Thank you.

24 minutes ago, greencloud9843 said:

how to restart the process

Check the box to enable the copy button.

 

However, it seems to me that if Parity Copy did, in fact, complete, it should be possible to New Config the disks with their new assignments and Trust Parity/Maintenance mode, then disable the disk that needs rebuilding. I don't recall ever discussing that before though.

 

But if Parity Copy didn't complete rebuild would be corrupt. Maybe safer to just do it over.

 

Any thoughts, @JorgeB @itimpi ?

 

 

Ah, ok... I missed the checkbox and was worried I would lose data. I can copy again (it took about 24 hours, but I can use it to exercise the new drive).

 

I think I found a thread where JorgeB had a process (https://forums.unraid.net/topic/93940-solved-parity-swap-procedure-asking-to-copy-again/) to avoid recopying.

 

It would be great to get the https://docs.unraid.net/legacy/FAQ/parity-swap-procedure/ doc updated to mention to not interrupt the process (refresh page, shutdown, restart, etc).

 

Thank you all.

8 minutes ago, greencloud9843 said:

found a thread where JorgeB had a process

That is basically the same process I was thinking about. We can do it without going to the command line but requires a few more steps.

If there was only one data disk and parity, old parity will be a mirror of disk1, so you could just do a new config, assign old parity as disk1, assign the new parity, start array to begin parity sync.