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Appendix B Hard disks and BIOS setup
B.1.3
Installation modes, jumpers
1. A hard disk can be installed in a computer as master or as slave. The mode of
hard disk installation is defined by the position of special connectors (called
jumpers) on the hard disk.
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 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 the 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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