SSH in, mount shows that /dev/md2 isn't mounted on /DataVolume and /dev/md2 isn't mounted on /shares/Public or /shares/Download (got a second MBWE drive to compare it to).
xfs_repair on /dev/md2 gives me:
Phase 1 - find and verify superblock... superblock read failed, offset 0, size 524288, ag 0, rval -1 fatal error -- Input/output error
Any clues where to go next? Bit of a linux noob, sorry.