Running version 7.1.2. Last week I replaced 2 of my drives that were failing. A few days after that, I had a third drive fail. When I rebooted to replace that today, the drive configuration seemingly switched back to the previous identification on those two drives.

Disks 2 and 13 were the drives I replaced last week, and disk 4 was the drive I was going to be replacing.

This was the configuration prior to rebooting to replace Disk 4 (please excuse the awful picture, I just took this to remind me which drive I needed to replace)

I'm not sure how to proceed without losing data. I did move all of the data off of disk 4 using unbalanced prior to this, so in theory I think the data still ultimately exists (unless I'm misunderstanding something). Also the array is encrypted, not sure if that complicates things.

I appreciate any advice!!

That suggests a flash drive issue, start by posting the diagnostics

Got it, here is the diagnostics file.

axiom-diagnostics-20250731-0650.zip

Don't see any flash drive issues for now, you can try this:

-Tools -> New Config -> Retain current configuration: All -> Apply

-Check all assignments and assign any missing disk(s) if needed, including the a new disk4, replacement disk should be same size or larger than the old one

-IMPORTANT - Check both "parity is already valid" and "maintenance mode" and start the array (note that the GUI will still show that data on parity disk(s) will be overwritten, this is normal as it doesn't account for the checkbox, but it won't be as long as it's checked)

-Stop array

-Unassign disk4

-Start array (in normal mode now), and post new diagnostics

All done, here is the new file!axiom-diagnostics-20250731-2036.zip

Emulated disk4 mounted, but it's empty. Is this expected?

1 minute ago, JorgeB said:

Emulated disk4 mounted, but it's empty. Is this expected?

Earlier you did say that you had moved all data off the drive so what you are seeing sounds sensible. Is there any reason to think differently?

3 minutes ago, itimpi said:

Earlier you did say that you had moved all data off the drive so what you are seeing sounds sensible

I missed that part, if that's expected OP can just rebuild the disk normally.

Great, I will do that. Thank you!!