Acronis Migrate Easy 7.0 - User Guide User Manual

Page 31

Appendix A Hard disks and BIOS setup

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 Acronis Migrate Easy we used a
Quantum

Fireball

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)

Sectors (Sec)

Mode Auto

CHS 1707

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.

Translation mode is how sector addresses are translated. This parameter appeared because in

BIOS versions, there were limitations to the maximum address capacity of disks, which is

504 MB (1024 cylinders x 16 heads x 63 sectors x 512 bytes). There are two ways to bypass

this limitation: (1) switch from physical to logical sector addresses (LBA), (2) use mathematics
to reduce the number of addressed sectors (cylinders) and increase the number of heads; this

method is called Large Disk (Large). The simplest decision is to set the value of this

parameter to Auto.