American Megatrends Atlas PCI-II, User Manual

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Atlas PCI-II Motherboard User’s Guide 44
Standard Setup,
Continued
Primary Master, Primary Slave Select one of these hard disk drive
icons to configure the hard disk drive named in the
option. A scrollable screen that lists all valid disk
drive types is displayed. Select the correct type and
press <Enter>.
Detecting IDE parameters If you select Detect Master or Detect Slave
from the Utility section of the WINBIOS Setup main
menu, AMIBIOS automatically finds all IDE hard
disk drive parameters for that drive. Before
automatically detecting IDE drives, make sure the
Onboard IDE option in Peripheral Setup is set to
Enabled.
AMIBIOS places the hard disk drive parameters it
finds in the Master Disk or Slave Disk fields in
Standard Setup.
Entering Drive Parameters You can also enter the hard disk
drive parameters. The drive 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.
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 hard disk
compensates for the physical difference in sector size by
boosting the write current for sectors on inner tracks. This
parameter is the track number where write
precompensation begins.
Landing Zone This number is the cylinder location where the heads will
normally park when the system is shut down.
Sectors The 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 drive
may have even more sectors per track.
Capacity The formatted capacity of the drive is the number of
heads times the number of cylinders times the number of
sectors per track) times 512 (bytes per sector).
Cont’d