CHAINTECH CT-6BTM Manual page 27

Type (Auto/User/None): Use the fields under the Type column to determine the method
you will use to configure the IDE devices. If you choose Auto, BIOS will automatically
detect and make optimal settings for most IDE hard drives.
The mainboard manufacturer recommends that you choose Auto for all
drives.
Choose User to define your own drive type manually. You must enter values indicated
in the table below into each drive parameter field. This information should be included
in the documentation from your hard disk vendor or system manufacturer:
Cyls/Head/Sector: The number of Cylinders, Heads, and Sectors can usually be found
written on the top of the hard disk. If you have a relatively new hard drive, entering
this information alone is usually sufficient for normal hard disk operation. The hard
disk will not work properly if you enter improper information for these categories.
Precomp: Older hard drives (i.e., MFM or RLL drives) have the same number of sectors
per track at the innermost tracks as at the outermost tracks. Thus, the data density
at the innermost tracks is higher and the bits are lying closer together. Even though
the physical size of a sector gets progressively smaller as the track diameter diminishes,
each sector must still hold 512 bytes. Write precompensation circuitry compensates
for the difference in sector size by boosting the write current for inner track sectors.
Landz: This defines the address of the landing zone and is only used for older hard
drives which do not have an auto-parking feature.
Mode: If the Type value is not None for any device, you must set the Mode value
for that device. There are four different Mode values: Auto, Normal, Large, and
LBA.
Auto - BIOS detects and enters the IDE drive type during bootup.
Normal - for IDE drives that meet the old IDE specification which support a
maximum capacity of 528MB (1024 cylinders, 16 heads, and 63 sectors).
TYPE Setting method
CYLS Number of cylinders
HEAD Number of heads
PRECOMP Write precompensation cylinder
LANDZ Landing zone
SECTOR Number of sectors
MODE Mode type
Table 3-1 Hard Disk Drive Parameters
Award BIOS Setup Program
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