Copyright © Apricorn, Inc., 2000-2007 61
Large PC manufacturers like Dell and Hewlett-Packard produce motherboards themselves,
and develop their own BIOS versions. You should always refer to the documentation that
came with your computer for instructions on proper BIOS configuration.
B.2.2
Standard CMOS setup menu
Parameters in the standard CMOS setup menu usually define the geometry of the
hard disk. The following parameters (and values) are available for each hard disk
installed in your PC:
Parameter Value
Purpose
Type 1-47,
Not
Installed,
Auto
Type 0 or Not Installed is used when there is no
hard disk installed (to uninstall it). Type 47 is
reserved for user-defined parameters or for
parameters detected by the IDE Auto detection
utility.
Auto value allows for automatic detection of IDE
disk parameters during the boot sequence.
Cylinder (Cyl)
1-65535
The number of cylinders on a hard disk. For IDE
disks, a logical number of cylinders is specified.
Heads (Hd)
1-16
The number of heads on a hard disk. For IDE
disks, a logical number of heads is specified.
Sectors (Sec)
1-63
The number of sectors per track of a hard disk. For
IDE disks, a logical number of sectors is specified.
Size (Capacity) MBytes
The capacity of the disk in megabytes. It is
calculated according to the following formula:
Size=(Cyl x Hds x Sct x 512) / 1024 / 1024.
Mode
(Translation
Method)
Normal/
LBA/
Large/Auto
Method of translation of sector addresses.
For example, to demonstrate the main features of Apricorn EZ Gig II, we used a
Quantum
TM
Fireball
TM
TM1700A hard disk as one of the disks in our examples. Its
parameters have the following values:
Parameter Value
Type Auto
Cylinder (Cyl)
827
Heads (Hd)
64
Sectors (Sec)
63
Mode Auto
CHS 1707
MB
Maximum LBA Capacity
1707 MB