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Thursday 14 April 2011

Secondary Storage Devices

Secondary Storage Devices


  • Magnetic storage devices
-Harddisk
-Floppy disk
-Tape Drive
-Zip drive
  • Optical storage devices
-Compact Disc (CD)
-Digital Versatile Disc (DVD)
-Blu Ray Disc (BRD)

Internal Hard Disk Drive

The internal hard disk drive is the main secondary storage device that stores all of your data magnetically, including operating system files and folders, documents, music and video. You can think of the hard disk drive as a stack of disks mounted one on top of the other and placed in a sturdy case. They are spinning at high speeds to provide easy and fast access to stored data anywhere on a disk.

External Hard Disk Drive

External hard disk drives 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 an external hard drive can be very useful, as they can safely store large amounts of information. They can be connected by either USB or Firewire connection to a computer and can even be connected with each other in case you need several additional hard drives at the same time.

Optical Drive

An optical drive uses lasers to store and read data on CDs and DVDs. It basically burns a series of bumps and dips on a disc, which are associated with ones and zeros. Then, this same drive can interpret the series of ones and zeros into data that can be displayed on your monitors. There are a few different types of both CD and DVD disks.

USB Flash Drive

USB flash memory storage device is also portable and can be carried around on a key chain. This type of a secondary storage device has become incredibly popular due to the very small size of device compared to the amount of data it can store (in most cases, more than CDs or DVDs). Data can be easily read using the USB (Universal Serial Bus) interface that now comes standard with most of the computers.

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