Do you have another copy of anything important and irreplaceable?

There are some important things that i dont have a backup of.

new cables installed and rebuild started ppnhost-diagnostics-20251004-1639.zip

You are rebuilding an unmountable filesystem on disk1.

Usually we recommend trying to repair the filesystem before rebuilding.

Are you rebuilding onto the same disk, or is this a replacement?

This is an existing dish. How do I repair the file system? Format the disk?

7 hours ago, p.wrangles said:

Format the disk?

Never format, check filesystem

okay, disk repaired all looks good, should i unmount the disk and remount to rebuild ontop again?

Assuming you already rebuilt, and then you repaired the filesystem on the rebuilt disk from the webUI, then nothing more needs to be done. Certainly no reason to rebuild again. Rebuild will not fix filesystem as you already saw, and assuming you did the repair from the webUI, parity was updated during the repair so everything should be in sync already.

Probably best if you just post new diagnostics so we can check.

I cancelled the rebuild yesterday and repaired the filesystem first - I haven't rebuilt yet, let me know if i should?

ppnhost-diagnostics-20251005-1926.zip

How did you get disk1 enabled if you didn't rebuild it?

After i fixed the drive the array just started

There seems to be something missing. Are you sure you didn't New Config?

When you repaired the filesystem, did you do it from the webUI? Or did you use the command line?

Definitely not New Config!

I booted in maintenance mode, clicked disk one, did check then fix, then rebooted

The question I would have at this point is whether or not you should rebuild parity.

If no rebuild was completed, then the array may be out of sync. If you disable/emulate disk1 so you can rebuild it, it may be back to unmountable.

If you are happy with the contents of disk1, then you should at least run a parity check.