Secondary Memory or Secondary Storage Devices

Secondary Memory

Ø Nonvolatile

Ø Slow compared to primary memory

Ø Less costly & high capacity

Categorizing Storage Devices

• The hardware that writes data to or reads data from a storage medium is called a storage device. A floppy disk drive is a storage device.

• Storage devices hold data, even when the computer is turned off.

• The two primary storage technologies are magnetic and optical.

• Magnetic storage are:

-Diskettes (floppy disks)

-Hard disks

• Optical storage are:

-Compact Disk Read-Only Memory (CD-ROM)

-Digital Video Disk Read-Only Memory (DVD- ROM)