Dhara's

AUXILIARY
STORAGE
DEVICE
Prepared by : - Dhara Palan

 PRIMARY STORAGE
 SECONDARY STORAGE
 TERITARY STORAGE
 OFF-LINE STORAGE
HIERACHY OF STORAGE: -

STORAGEAUXILIARY DEVICE
SECOND
ARY OR
SUPPOR
TING
OR
SUPPLE
MENT
MADE
FOR
PARTIC
ULAR
PURPOS
E
SAVE
THE
DATA
PERM
ENAN
TLY

There are mainly two types of
auxiliary storage
device, based on the type of
data type.
• Sequential access media
• Random or direct access
media.
TYPES OF STORAGE : -

The data stored in the media
can only be read in sequence
and to get to a particular point
on the media, we have to go
through all the preceding
points.
SEQUENTIAL ACCESS MEDIA :-

The data stored in this media
can access any point at
random without passing
through intervening points, so
it is called as direct access
media or random access
media.
DIRECT ACCESS MEDIA :-

There are two types of hard disks.
INTERNAL HARD DISK And
EXTERNAL HARD DISK.
1)Internal Hard Disk :-
It is a main auxiliary storage
device that stores all of your data
magnetically, including operating
system files and
folders, documents, music and
video.
HARD DISK DRIVE (HDD) :-

INSTALLATION OF
INTERNAL HARD DISK

External hard disk drivers are
used when the internal drive
does not have any free space
and you need to store more
data. In addition, it is
recommended that you always
back up all of your data and
the external hard drives
become very useful , as that
can safely stored large amount
of information.
2)EXTERNAL HARD DISK DRIVE :-

They can be connected by
either U S B or F I R E W I R E
connection to a computer
and can even be connected
with each other in case you
need several additional hard
drivers at same time.

A floppy disk
is a storage
medium
composed of
a disk of thin
and flexible
storage
medium.
FLOPPY DISK :-

By 2010 computer motherboards
were rarely manufactured with
floppy drive support; 3 ½” floppies
could be used as an external USB
drive, but 5 ¼” , 8’’ and non
standard drives could only be
handled by old equipment

It is also
portable and can
be carried
around on a key
chain. It is very
popular due to
very small size
of the device.
USB FLASH DRIVE :-

USB flash drives offers potential
advantages over other portable
storage devices. Particularly the
floppy disk. They hold much
more data, and operate more
reliably due to their lack of
moving parts. The USB connector
is protected by a removable cap
or by retracting into the body of
the drive, Although it is not liable
to be damaged if exposed.

OPTICAL DISK:-
It is a storage
medium from
which data is read
and to which it is
written by lasers.
The optical
storage
technology
association(OSTA)
promotes
standardized
optical storage
formats

DVD is an optical disc storage
format, invented and develop
by Philips, Sony, Toshiba and
Panasonic in 1995.DVDs offer
higher storage capacity then
compact disk while having the
same dimensions i.e.
4 CDs = 1 DVD
DIGITAL VERSATILE DISK
(DVD):-

As next generation high-
definition optical format also
use a disc identical in some
aspects yet more advanced then
a DVD.

It is developed by the Imation
corporation. The superdisk,
sometimes marketed as LS-120
and a later variant LS-240, is a
high-speed, high-capacity
alternative to the 90 mm
(3.5 in), 1.44 MB floppy disk.
SUPERDISK:-

JAZ DISK:-
The jaz drive was a removable
disk storage system, introduced
by the Iomega company in 1995.
The jaz disks were originally
released with a 1 GB capacity .The
fast data rates and large storage
capacity make it a viable
alternative for backup storage As
well as everyday use.

The zip drive is a medium-capacity
removable disk storage system that
was introduced by Iomega in late
1994. Originally, zip disks launched
with capacities of 100 MB, but later
versions increased this to first
250 MB and then 750 MB. They are
relatively inexpensive and durable.
ZIP DISK :-

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