That's what I am having at the moment.
I am using unraid v5 and have had no issues. But, I recently discovered that I am down to roughly 30GB of free space and need more space to store (home) videos and photographs. I purchased two 12TB drives: one to replace the 4TB parity drive and the other to replace one of two 1TB drives. After that, the old parity would replace the remaining 1TB drive.
I ran a parity check, turned off autostart, did a safe shutdown, replaced the parity, and powered up.
The boot process stopped a few lines after a message (attached) that the volume (sda1) was not properly unmounted. No idea which drive--though I assume it's the parity--it was because the unraid identifications are only three letters (e.g., parity was "sdb"). At this point, I cannot enter any line commands: only hit return.
After waiting a few minutes, I thought the prudent thing to do would be to just put the original parity drive back in, and the cogitate for a while.
Unfortunately, it fails to boot. It now stops after remounting the filesystem as read only (again, see attached).
These are twenty years of the boys growing up, so it has to be saved!
What should I do?
thanks in advance.