Abit AX5 Instruction Booklet page 53

Introduction of BIOS
ä LBA (Logical Block Addressing) mode:
LBA mode supports hard disk drives up to 8.4Giga. This mode
uses a different method to calculate the position of disk data to
be accessed. It translates Cylinders (CYLS), Heads and Sectors
into a logical address where data are located. The Cylinders,
Heads, and Sectors displayed in this menu do not reflect the
actual structure of the hard disk, they are just reference values
used to calculate actual positions. Currently, all high capacity
hard disks support this mode, that' s why we recommend you
use this mode. The HDD AUTODETECTION option in the
Main Menu will automatically detect the parameters of your
hard disk and the mode supported.
ä LARGE Mode:
When the number of cylinders (CYLs) of the hard disk exceeds
1024 and DOS is not able to support it, or if your operating
system does not support LBA mode, you should select this
mode.
FDD supporting 3 Mode:
l
3 Mode floppy disk drives (FDD) are 3 1/2" drives used in Japanese
computer systems. If you need to access data stored in this kind of floppy,
you must select this mode, and of course you must have a 3 Mode floppy
drive.
2
For further information about HDD installation, refer to Appendix E.
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