American Megatrends Baby Voyager 80486, User Manual

Page: 53 / 83

Super-Voyager LC Motherboard User's Guide
STANDARD CMOS SETUP Options,
Continued
Hard Disk Drive C:
Hard Disk Drive D:
Move to these fields via the and keys and select the hard disk
drive type via <PgUp> and <PgDn> that matches the drive
parameters for the hard disk drive in the computer. The hard disk
drive manufacturer usually supplies the drive parameters. See the
AMIBIOS hard disk drive type table on the following page, which
lists the drive parameters for drive types 1 - 46. If the drive
parameters do not match any of the drive types in the table, select
drive type 47 and enter the drive parameters manually. Type 47
must be used for IDE drives.
Not Installed
is used for diskless workstations and SCSI hard disk
drives.
Type 47 can be used for both hard disks C: and D:. The parameters
for type 47 under Hard Disk C: and Hard Disk D: can be different,
permitting two user-definable hard disk drives. The parameters are:
Parameter Description
Type The number for a drive with certain identification parameters.
Cylinders The number of cylinders in the disk drive.
Heads The number of heads in the disk drive.
Write
Precompensation
The size of a sector gets progressively smaller as the track diameter
diminishes. Yet each sector must still hold 512 bytes. Write
precompensation circuitry on the disk drive compensates for the physical
difference in sector size by boosting the write current for sectors on inner
tracks. This is the track number where write precompensation begins.
Landing Zone This number is the cylinder location where the heads normally park when
the system is shut down.
Sectors Number of sectors per track. MFM drives have 17 sectors per track. RLL
drives have 26 sectors per track. ESDI drives have 34 sectors per track.
SCSI and IDE drives have even more sectors per track.
Capacity The formatted capacity of the drive is Number of Heads x Number of
Cylinders x Number of Sectors per Track x 512 bytes (Bytes per Sector).