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Storage Media Types
Storage Media Types
Storage media enables a computer to store information and retrieve information for later use.
Storage devices can be classified into 2 categories:
primary storage device or
secondary storage device
Primary Storage Device
Primary Storage Device
RAM (Random Access Memory) (volatile = temporary)
Multi-tasking between softwares
ROM (Read-Only Memory) (permanent)
Secondary Storage Device
Secondary Storage Device
Portable Hard-Disk
Internal Hard Disk
Flash Drive
Thumbdrives
CF Card
microSD card
CD-ROM
DVD-ROM
Memory Card (SD Card)
Solid State Drive (SSD)
How Storage Media Works
How Storage Media Works
(1) Magnetic Storage
(1) Magnetic Storage
Computer hard disks make use of magnetic properties to store data.
(2) Optical Storage
(2) Optical Storage
A CD or DVD is a piece of plastic with a silver coloured layer of aluminium with tiny bumps. The CD or DVD drive uses laser to detect these bumps and translate them into data.
(3) Flash Memory
(3) Flash Memory
USB Flash Drives, ThumbDrives, Memory Cards (CF cards, microSd cards).
Digital audio players use flash memory.A huge advantage of flash memory is that it is a solid-state storage device with no moving parts unlike a hard disk.
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