User Guide

Appendix B Hard disks and BIOS setup
51
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
In BIOS setup, you can set the Type parameter to User Type HDD (user-defined
type). In this case, you also have to specify the value of the translation mode
parameter, which can be Auto/Normal/LBA/Large.