Chapter 4 - AWARD BIOS Setup
Stingray II+ User's Guide
4-31
The maximum HDD size supported by LBA mode is 8.4 Gigabytes which
is obtained by the following formula:
no. Cyclinder
( 1024)
x no. Head
( 255)
x no. Sector
( 63)
x bytes per sector ( 512)
8.4 Gigabytes
LARGE mode
Extended HDD access mode supported by Award Software.
Some IDE HDDs contain more than 1024 cylinder without LBA support
(in some cases, user does not want LBA). The Award BIOS provides
another alternative to support these kinds of HDD!
Example of LARGE mode:
CYLS.
HEADS
SECTOR
MODE
1120
16
59
NORMAL
560
32
59
LARGE
BIOS tricks DOS (or other OS) that the number of cylinders is less than
1024 by dividing it by 2. At the same time, the number of heads is multiĆ
plied by 2. A reverse transformation process will be made inside INT13h
in order to access the right HDD address the right HDD address!
Maximum HDD size:
no. Cyclinder
( 1024)
x no. Head
( 32)
x no. Sector
( 63)
x bytes per sector
( 512)
1 Gigabytes