American Megatrends 42 Series, Руководство пользователя

Страница: 55 / 93

STANDARD CMOS SETUP Options,
Continued
Hard Disk Drive Parameters
Hard disk drive types are identified by the following parameters:
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 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 and ESDI drives have 34 sectors per
track. IDE and SCSI drives have even more sectors per track.
Capacity The formatted capacity of the drive is the Number of Heads *
Number of Cylinders * Number of Sectors per Track * 512 (Number
of Bytes per Sector)