BECKHOFF Onboard SATA RAID - Manual (Page 8)

Status information
Display after the failure of a hard disk
If the computer is restarted following the failure of a hard disk, the second
boot screen may look like this, for example:
Failure of a hard disk
The status of the RAID volume is described here as “Degraded”. The
status of the hard disk on Port 0 can be seen to be okay (green).
If more than 2 SATA hard disks are installed inside the PC and one of the
two hard disks in the RAID volume failes or the hard disk configuration
inside the PC was changed because of other reasons, then at the next
start or reboot of the PC it is required to enter the BIOS Setup. Go to
"Advanced BIOS Features" "Hard Disk Boot Priority" and move the "INTEL
VOLUME0" to the top position by using the cursor down and the picture up
key. Otherway the PC will try to boot from hard disk three or four instead of
booting from the RAID volume.
The Configuration Utility does not display any further information:
Configuration Utility
6 Beckhoff onboard SATA-RAID