You're having issues with the disks on the HBA:
Mar 14 07:32:02 Unraid kernel: md: disk3 read error, sector=4395399968
Mar 14 07:32:02 Unraid kernel: md: disk1 read error, sector=4395399944
Mar 14 07:32:02 Unraid kernel: md: disk0 read error, sector=4395399944
Make sure it's well seated or try a different slot, you should also update the LSI firmware to latest.