ACRONIS True Image Home 2010 Uživatelská příručka stáhnout pdf (Strana 187)

Incorrect connection of the cable with either the hard disk or the motherboard does not necessarily

damage the electronics of the disk or the motherboard. The hard disk is simply not detected or

initialized by BIOS.

There are some models of hard disks, especially the older ones, for which incorrect connection damaged the

electronics of the drive.

***

We will not describe all the types of hard disks. Currently the most widely used are those with IDE or SCSI

interfaces. Unlike IDE hard disks, there can be from six to 14 SCSI hard disks installed in your PC. However, you

need a special SCSI controller (called a host adapter) to connect them. SCSI hard disks are not usually used in

personal computers (workstations), but are found mostly in servers.

Aside from an IDE cable, a four-thread power cable must be connected to the hard disks. There is

only one way to plug in this cable.

24.2.3 Configuring hard disk drives, jumpers

A hard disk drive can be configured in a computer as master or as slave. The configuring is done

using special connectors (called jumpers) on the hard disk drive.

The jumpers are either located on the electronic board of the hard disk or a special socket that

provides for the connection of the hard disk and the motherboard.

There is usually a sticker on the drive that explains the markings. Typical markings are DS, SP, CS and

PK.

Each jumper position corresponds to one hard disk(s) installation mode:

 DS – master/factory default

 SP – slave (or no jumper required)

 CS – cable select for master/slave: the purpose of the hard disk is determined by its physical

position with respect to the motherboard

 PK – jumper parking position: the position where one can put the jumper if it is not necessary in

the existing configuration

The hard disk with the jumper in master position is treated by the basic input/output system (BIOS)

as bootable.

The jumpers on hard disks that are connected to the same cable can be in the cable select for

master/slave position. In this case, BIOS will deem as "master", the disk that is connected to the IDE

cable, which is closer to the motherboard than the other one.

Unfortunately, hard disk markings were never standardized. You might well find that markings on your hard

disk differ from the ones described above. Moreover, for old types of hard disks, their purpose could be defined

by two jumpers instead of one. You should study the markings carefully before installing your hard disk in the

computer.

It is not enough to physically connect the hard disk to the motherboard and set the jumpers properly

for the hard disk to function — hard disks have to be properly configured with the motherboard

BIOS.

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ACRONIS True Image Home 2010 Uživatelská příručka Strana 187