
Chapter 3 - Standard CMOS Setup
3-6
IBC 2600 User’s Guide
Sectors (Sec) designates the number of disk sectors per track.
Size is the formatted capacity of the drive (in megabytes) based
on the following formula:
# of heads x # of cylinders x # of sects/cyln x 512 bytes/sect
IDE Drive Type Setup Options
For each of the four hard disk drives which is an IDE drive, the following
options are also available for the drive:
Logical Block Addressing (LBA) Mode
This option allows you to enable IDE LBA (Logical Block Addressing)
Mode for the specified primary or secondary IDE drive. Data is accessed
by block addresses rather than by the traditional cylinder head-sector
format. This allows you to use drives larger than, 528MB. In LBA mode,
the maximum drive capacity supported is 8.4GB (gigabytes).
If
LBA Mode
is set to
On
and is supported by the hard disk drive, and if
the drive is formatted, AMIBIOS enables LBA mode and translates the
physical parameters of the drive to logical parameters. If a hard disk
drive which supports LBA mode and has a capacity greater than 528MB
was formatted with LBA mode
disabled,
AMIBIOS does not enable LBA
mode even if the
LBA Mode
parameter is set to On in Standard CMOS
Setup.
If LBA Mode is set to
Off
, AMIBIOS uses the physical parameters of the
hard disk and does not translate parameters. The operating system
which uses the parameter table then sees only 528MB of hard disk
space even if the drive contains more than 528MB.
Available options are:
Off
On
Block (Blk) Mode
This option supports transfer of multiple sectors to and from the specified
primary or secondary IDE drive.
Block mode boosts IDE drive performance by increasing the amount of
data transferred during an interrupt. Block mode allows transfers of up to
64KB per interrupt, whereas only 512 bytes of data can be transferred
per interrupt if block mode is not used.
Summary of Contents for IBC 2600
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