Study Smart Blog: Storage

Storage

❥ Storage holds data , instructions and information for future use
❥ A storage medium /,media is the physical material on which a computer keeps data , instructions and information .

Storage Capacity

♬ Capacity is the number of bytes a storage medium can hold

Kilobytes = 1,024 bytes
Megabytes = 1,024 Kilobytes
Gigabytes = 1,024 Megabytes
Terabytes = 1,024 Gigabytes

Conversion unit

1 GB = 1 x 1024 x 1024 OR 1 GB = 1 X 2^10 X 2 ^10

= 1 048 576 KB =1 048 576 KB

1200 MB = 1200 / 1024 OR 1200 MB = 1200 / 2^10

= 1.17 GB = 1.17 GB

STORAGE DEVICE

A storage is the computer hardware that records and retrieves items to and from storage media .
To store data and programs when they are not being processed .
Stores files permanently.
Available in the form of hard disk, CD, USB drive etc

Types of Storage

• Magnetic Storage

• Optical Storage

• Flash memory

Magnetic Storage

– Uses different patterns of magnetization on a magnetically coated surface to store information.

– Examples of magnetic storage are:

❤ Hard Disk

❤ Floppy disk

ლ Hard Disk

A hard disk contains one or more inflexible,circular platters that use magnetic particles to store data, instructions, and information

Optical Discs Storage

❣ Stores information in deformities on the surface of a circular disc and reads this information by illuminating the surface with a laser diode and observing the reflection.

❣ Types of optical disc are:

» Compact Disc (CD)

» Digital Video Disc (DVD)

» Blu-ray Disc (BD)