protech PC-550, Руководство пользователя, Страница: 77 / 106

Chapter 5 Award BIOS Setup
PC-550 USER
′
S MANUAL
Page: 5-19
HDD MODE
The Award BIOS supports 3 HDD mode: NORMAL, LBA, & LARGE
NORMAL mode:
Generic access mode in which neither the BIOS nor the IDE controller will
make any transformations during accessing.
The maximum number of cylinders, heads & sectors for NORMAL mode are
1024, 16, &63.
no. Cylinder (1024)
x no. Head ( 16)
x no. Sector ( 63)
x
no. Per sector ( 512)
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Total: 528 Mega byte
If user set his HDD to NORMAL mode, the maximum accessible HDD size
will be 528 Megabytes even though its physical size may be greater than that.
LBA (logical Block Addressing) mode:
A new HDD accessing method to overcome the 528 Megabyte bottleneck. The
number of cylinders. head & sectors shown in setup may not be the number
physically contained in the HDD.
During HDD accessing, The IDE controller will transform the logical address
described by sector, head & cylinder number into its own physical address
inside the HDD.
The maximum HDD size supported by LBA mode is 8.4 Gigabyte which is
obtained by the following formula:
no. Cylinder (1024)
x no. Head ( 255)
x no. Sector ( 63)
x
no. Per sector ( 512)
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Total: 8.4 Giga byte