Correct, certain SCSI card allow to adjust time out, but that only if SCSI hard doesn't have on-board BIOS. If it does though, 99.9% of SCSI BIOSes will
scan all possible bootable IDs to detect if there is a bootable device attached (hard drive, bootable CD-ROM, ZIP drive, etc.). If you know for sure that
there are no SCSI-bootable devices are attached, that feature can be disabled and significantly save boot up time.