I was having some transfer speed issues with my Quad SATA hat and enclosure. So I decided just to power everything down and do a minor disassembly of everything. Just to make sure everything was seated correctly. Once I put everything back together and powered everything back up the way it was before my Raid 5 doesn’t show up in OMV5 anymore. Nothing should have changed what could cause my raid not to show up anymore. All the disks are showing up.
nvm, I figured it out. Had to use these 2 commands to fix:
mdadm --stop /dev/md0 mdadm -A --force /dev/md0 /dev/sd[abcd]1