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Raptor MicroATX – Installation Guide
Figure 2-1: The Embedded BIOS Basic Setup Screen is used to
configure drives, boot actions, and POST.
Configuring Drive Assignments
Embedded BIOS allows the user to map a different file system to
each drive letter. The BIOS allows file systems for each floppy
(Floppy0 and Floppy1), and each IDE drive (Ide0, Ide1, Ide2,
and Ide3). Figure 2-1 shows how the first floppy drive (Floppy0)
is assigned to drive A: in the system, and then shows how the
first IDE drive (Ide0) is assigned to drive C: in the system.
To switch two floppy disks around or two hard disks around, just
map Floppy0 to B: and Floppy1 to A:, and for hard disks map
Ide0 to D: and Ide1 to C:.
Caution: Take care to not skip drive A: when making
floppy disk assignments, as well as drive C: when
making hard disk assignments. The first floppy
should be A:, and the first hard drive should be C:.
Also, do not assign the same file system to more than
one drive letter. Thus, Floppy0 should not be used for
both A: and B:. The BIOS permits this to allow
embedded devices to alias drives, but desktop
operating systems may not be able to maintain cache
coherency with such a mapping in place.
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