HP Kayak XU04 Installation And Configuration Manual page 26

The only way to boot on the non-RAID device is to go to the SCSISelect
Utility, then select Configure/View Interface Settings. Use the arrow
keys to select the SCSI Device Configuration, then in the Include in
BIOS Scan option, move to the SCSI Device ID to be disabled and press
the key.
Q: After I installed the FastRAID card, I could not boot Windows NT
from my non-striped wide SCSI drive. I get a blue screen with the
message "BOOT DEVICE NOT FOUND".
A: Even if the drive is not configured in a RAID array, you can boot on
it before installing the FastRAID card provided that the required SCSI
drivers are installed.
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