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Working with SCSI and IDE/EIDE Drives
In a system that combines SCSI disk drives with a standard ATAPI CD-ROM drive, the
system attempts to boot from the CD-ROM drive before it attempts to boot from a SCSI disk
drive. This is because, by default, the BIOS looks for an IDE boot drive, and then for the
CD-ROM drive, before it looks for a SCSI disk drive. Note the following:
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Do not restart the system with a bootable CD (such as the Windows NT software CD) in
the CD-ROM drive.
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You can change the system’s boot device order in the BIOS to boot first from a diskette,
then from a SCSI disk drive, and then from the ATAPI CD-ROM drive.
You can boot the system from an external SCSI disk drive connected to the installed SCSI
adapter.
To boot from an external SCSI disk drive:
1. Disconnect any IDE or EIDE disk drives from the primary and secondary IDE controllers.
The system’s BIOS will not accept a mixture of SCSI and IDE/EIDE devices if the boot
device is a SCSI disk drive.
2. Configure the BIOS for a SCSI system.
If you have more than one bootable SCSI adapter installed, the system BIOS will attempt to
start the system using a hard disk drive connected to the bootable SCSI adapter in the lowest-
numbered PCI slot. To start the system using a specific external SCSI hard disk drive, ensure
the drive’s SCSI adapter is installed physically lower in slot order than all other bootable SCSI
adapters.
If the CD-ROM drive is not visible in Windows NT after booting from a SCSI disk drive,
make sure the AT Attachment Packet Interface (ATAPI) device is enabled.
To enable the ATAPI device in Windows NT:
1. Go to Start/Settings/Control Panel/Devices.
2. Highlight atapi in the Device list; then select Startup. The Device dialog displays.
3. Under Startup Type, select Boot; then select OK.
See Chapter 5, “Configuring the BIOS,” for BIOS information. See Chapter 1, “Setting Up
the Hardware,” for device connection information.
