Unformatted text preview: FAT and setting aside sufficient space on the disk for it.
Disk formatting is one of the basic tasks handled by the computer's operating system. If
the formatting done by the disk drives of two different computer systems is exactly the
same, the two computers are said to have compatible disk drives. Compatible disk drives
allow disks prepared by one computer to be used by the other computer. This facilitates
transfer of data and programs from one computer to another which are not linked
together. Note that this is not possible by the use of disks between computers having
incompatible disk drives.
A magnetic disk has to be mounted on a disk drive before it can be used for reading or
writing of information. A disk drive contains all the mechanical, electrical and electronic
components for holding one or more disks and for reading or writing of information on to
it. That is, it contains the central shaft on which the disks are mounted, the access arms
assembly, the read/write heads, and the motors to rotate the disks and to move the access
arms assembly. Although disk drives vary greatly in their shape, size and disk formatting
pattern, they can be broadly classified into the following two types:
Disk drive with interchangeable magnetic disks.
These disk drives allow the
loading and unloading of magnetic disks as and when they are needed for reading/writing
of data on to them. That is, at one instance a particular disk might be loaded for use, and
at another instance another disk might be loaded in the same disk drive. This allows data
on disks to be stored off-line and virtually unlimited capacity of the disk system because
as many disks as required can be used one after another to store very large data sets.
2. Disk drive with fixed magnetic disks. These disk drives come along with a set of
permanently fixed disks. In this case, the disks along with the read/write heads and the
access mechanisms of the disk drive are permanently housed in sealed, contaminationfree containers. The sealed packaging allows the disks to operate in a dust-free
environment. This enables the...
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This document was uploaded on 04/07/2014.
- Spring '14