Asus M2N-VM DH Manual page 66

Access Mode [Auto]
The default [Auto] allows automatic detection of an IDE hard disk drive.
Select [CHS] for this item if you set the IDE Primary Master/Slave to
[Manual]. Configuration options: [CHS] [LBA] [Large] [Auto]
Capacity
Displays the auto-detected hard disk capacity. This item is not
configurable.
Cylinder
Shows the number of the hard disk cylinders. This item is not configurable.
Head
Shows the number of the hard disk read/write heads. This item is not
configurable.
Sector
Shows the number of sectors per track. This item is not configurable.
Transfer Mode
Shows the Transfer mode. This item is not configurable.
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.
2-18 Chapter 2: BIOS setup