Changing The Hard Drive Sequence - DEC Digital PC 3500 System Reference Manual

Using the BIOS Setup Utility

Changing the Hard Drive Sequence

If your computer has multiple hard disk drives installed, it might become necessary to
change the hard drive boot sequence. For example, when you have more than one
operating system installed.
To change the hard drive boot sequence, proceed as follows:
1. Reboot the computer and enter Setup.
2. Highlight the "Boot" menu.
3. Highlight "Hard Drive" and press [Enter].
The installed hard drive devices are displayed. The number shows the
current order that the hard drives are installed during computer boot.
4. Use the [↑] and [↓] arrows to locate the field you want to change. Then use
the [+] to raise the order and [-] to lower it.
5. Press [Esc] twice then [Enter] twice to exit the BIOS Setup utility and to
reboot the computer so changes immediately take affect.
When changing the hard drive boot sequence, be aware of the following:
•
Many advanced operating systems, such as Windows 95, Windows NT, OS/2
Warp, Unix, and others, modify the boot sector of any hard disk drives that are
installed in the computer, while the operating system is being installed. This can
cause normally bootable hard disk drives to be rendered non-bootable, even
though the user did not want this behavior.
In systems where there are two or more bootable hard disk drives, it is
recommended that all bootable hard disk drives, other than the target of the new
operating system, be removed from the computer before installing the new
operating system.
Once installation of the new operating system is complete, the other hard disk
drives can then be reinstalled. This simple procedure prevents the operating
system from modifying the boot sectors of the other bootable drives, thus
preserving the capability of choosing one of several hard disk drives from which
to boot.
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