I've experienced a hardware failure on my OMV server. I believe something along the lines of motherboard failure.
My OMV ran on a USB drive, which I still have.
I had four hard drives in my OMV:
3TB hard drive ext4
2TB hard drive ext4
2x 1TB hard drives in a mirrored RAID configuration
Can any of these simply be plugged into any Linux system to access the data?