User guide

CommPlete Series 4000 Server SBC, Model IPC-551 67
Award BIOS Setup
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, and 63.
no. Cylinder (1024)
x no. Head ( 16)
x no. Sector ( 63)
x no. Bytes per Sector ( 512)
-
Total: 528 megabytes
If the user sets the 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:
This new HDD accessing method overcomes the 528 megabyte
bottleneck. The number of cylinders, heads and 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 the sector, head, and cylinder numbers into its
own physical address inside the HDD.
The maximum HDD size supported by LBA mode is 8.4 gigabytes,
which is obtained by the following formula:
no. Cylinder (1024)
x no. Head ( 255)
x no. Sector ( 63)