5.
A plastic tape coated with iron oxide for use in
magnetic recording.
Magnetic tape is a serial access medium, similar
to an audio cassette, and so data cannot be
quickly located.
However large amounts of information can be
stored within magnetic tape. This characteristic
has prompted its use in the regular backing up of
hard disks.
Made by: Muhammad Hassaan Arif
6. The
primary computer storage device. Like
tape, it is magnetically recorded and can be
re-recorded over and over.
Disks
are rotating platters with a mechanical
arm that moves a read/write head between
the outer and inner edges of the platter's
surface.
Made by: Muhammad Hassaan Arif
7. Common
–
–
–
types are:
Hard disks
Floppy disks
Zip disks
It
can take as long as one second to find a
location on a floppy disk to as little as a couple
of milliseconds on a fast hard disk.
Made by: Muhammad Hassaan Arif
9. Memory
is a temporary workplace where the
computer transfers the contents of a file while
it is being used.
Random
Access Memory (RAM) is a
computer storage location that allows
information to be stored and accessed quickly
from random locations.
Made by: Muhammad Hassaan Arif
10. Storage,
also known as mass media, refers to
the various media on which computer system
can store data.
Hard
drive is one of them. There are some
features such as:
High capacity disk.
Most common media of storage.
Use one or more metal magnetic disks.
Made by: Muhammad Hassaan Arif
11. 2
The
type of operations they perform.
The
method they use to access the information.
The
technology they use.
Their
capacity and speed.
Made by: Muhammad Hassaan Arif
20.
A disk is formatted; it is divided into tracks
and sectors, and a file allocation table (FAT) is
created.
Track
– circular band
Sector – pie shaped section
Cluster – two or more adjacent sectors
FAT – keeps tracks of specific locations of files
Made by: Muhammad Hassaan Arif
23. Floppy
Disk
Capacity – 720 KB to 1.44 MB
Hard
Drive
Capacity – up to 1000 GB ( 1 TB)
CD
ROM/DVD
Capacity – CD ROM 650 MB
– DVD 17 GB
Made by: Muhammad Hassaan Arif
25. High
– density floppy disks that are commonly
used today store 1.44MB and 2.8MB of data.
A
disk or diskette is a portable storage medium.
Low capacity removable disk.
Not widely used today.
Made by: Muhammad Hassaan Arif
27. 4
CD-ROM
stand for compact disc read only
memory.
CD-ROM drives can not write data to disc.
They are capable of storing 650 MB of data.
They are used for operating system; large
application programs.
Made by: Muhammad Hassaan Arif
28. CD-R
Discs
can only be
written to “once”
CD-RW
Discs
are erasable
Discs
CD-R
drives are
capable of reading
and writing data.
can be written
to many times
CD-RW
drives are
capable of reading,
writing and erasing
data
Made by: Muhammad Hassaan Arif
29. DVD
stand for Digital Video Disc.
DVD
technology is similar to CD-ROM
technology.
DVDs
are capable of storage up to 17GB of
data.
DVD-R
and DVD-RW drives have the
ability to read and write data.
Made by: Muhammad Hassaan Arif
30. Solid
state storage devices use
nonvolatile memory chips to retain
data.
They
do not have moving parts.
They
are small, lightweight, reliable
and portable.
Made by: Muhammad Hassaan Arif
