AUXILIARY STORAGE DEVICE

Prepared by : - Dhara Palan

PRIMARY STORAGE SECONDARY STORAGE TERITARY STORAGE OFF-LINE STORAGE

HIERACHY OF STORAGE: -

STORAGEAUXILIARY

DEVICE

SECONDARY OR SUPPORTING OR SUPPLEMENT

MADE FOR PARTICULAR PURPOSE

SAVE THE DATA PERMENANTLY

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 :-

MAGNETIC TAPE

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 fi les 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 USB or F IREWIRE connection to a computer and can even be connected with each other in case you need several additional hard drivers at same time.

A fl oppy disk is a storage medium composed of a disk of thin and fl exible 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

TYPES OF OPTICAL DISK:-

Installation of CD :-

DVD is an optical disc storage format, invented and develop by Philips, Sony, Toshiba and Panasonic in 1995.DVDs off er 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 fl oppy 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 :-