Supermicro 440FX, Reference Manual

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BIOS User's Manual
or IDE-2 or IDE-3 is selected as 1st boot device, IDE-0 cannot be
selected as 2nd boot device. This means that only one IDE device
can be selected as the boot device.
IDE-0, IDE-1, IDE-2, IDE-3 are the four hard disks than can be in-
stalled by the BIOS. IDE-0 is the first hard disk installed by the
BIOS, IDE-1 is the second hard disk, and so on. For example, if the
system has a hard disk connected to Primary Slave and another
hard disk to Secondary Master, then IDE-0 will be referred to as the
hard disk connected to Primary Slave and IDE-1 will be referred to
as the hard disk connected to the Secondary Master. IDE-2 and
IDE-3 are not present. Note that the order of the initialization of the
devices connected to the primary and secondary channels are Pri-
mary Master first, Primary Slave second, Secondary Master third,
and Secondary Slave fourth.
The BIOS will attempt to read the boot record from 1st, 2nd, and 3rd
boot device in the selected order until it is successful in reading the
booting record. The BIOS will not attempt to boot from any device
which is not selected as the boot device.
Try Other Boot Device
This option controls the action of the BIOS if all the selected boot
devices failed to boot. The settings for this option are Yes or No. If
Yes is selected and all the selected boot devices failed to boot, the
BIOS will try to boot from the other boot devices (in a predefined
sequence) which are present but not selected as boot devices in
the setup (and hence not yet been tried for booting). If selected as
No and all selected boot devices failed to boot, the BIOS will try not
to boot from the other boot devices which may be present but not
selected as boot devices in setup. The Optimal and Fail-Safe de-
fault settings are Yes.
Initial Display Mode