Did you check the literature that came with the drive? It should specify a bootable SCSI ID, often zero. Also check CMOS option, you want to boot SCSI before IDE.
I have these these hard drives on SCSI, it does'nt appear on the primary drive or slave on the cmos, but it appears on SCSI select utility. When I try to boot from cd and install the Windows XP the drive cannoot be detected.