Asus A7N8X-E - Manual (Page 72)

4-12 Chapter 4: BIOS Setup
Access Mode [Auto]
The default [Auto] automatically detects an IDE hard disk drive. Select [CHS]
in coordination with the [Manual] setting of the IDE Primary Master in order
to enter the Hard Disk Drive values manually.
After making your selections on this sub-menu, press the key to return
to the Main menu. When the Main menu appears, the hard disk drive field
displays the size for the hard disk drive that you configured.
[Manual] & [CHS] Settings
Manually enter the number of cylinders, heads and sectors per track for the
drive. Refer to the drive documentation or on the drive label for this information.
After entering the IDE hard disk drive information into BIOS, use a disk
utility, such as FDISK, to partition and format new IDE hard disk drives.
This is necessary so that you can write or read data from the hard disk.
Make sure to set the partition of the Primary IDE hard disk drives to
active.
Before attempting to configure a hard disk drive, make sure you have the
correct configuration information supplied by the drive manufacturer.
Incorrect settings may cause the system to fail to recognize the installed
hard disk.