STORAGE
Definition
Storage holds data, instructions and information for future use.
Characteristics
- Storage is non-volatile; it does not lose it contents when the power is off
- Has bigger capacity compared to memory (limited capacity)
Definition of storage capacity
The number of bytes of storage medium can hold.
Definition of storage device
Hardware that records and/or retrieve items to and from storage media.
Definition of storage media
The physical material on which a computer keeps data, information, programs and applications.
Types of storage media
Hard Disks
Solid State Drives
USB Flash Drives
Memory Cards
Optical Discs
Hard Disk
Function
contains one or more inflexible, circular platters that use magnetic particles to store data, instructions and information
Characteristics
High-capacity storage
Types of hard disks
Internal Hard Disk
External hard disk
An internal hard disk can be mounted inside a desktop or laptop
Separate freestanding storage device that connects with a cable
Solid State Drives
Functions
Uses flash memory to store data, instructions and informations
Characteristics
SSDs contain no moving parts
Current SSDs storage capacities up to 8 TB
Benefits
Faster access time
Faster transfer rates
More durable & shock resistant
Drawbacks
Higher failure rate
Costs is much higher
Flash Memory Storage
that uses solid-state chips that maintains stored data without any external power source.
Types
USB flash drive
Memory cards
that users plug in a USB part on computer
Insert and remove from a slot in personal computer.
Examples;
SD card
MicroSD card
Optical Disc
consists of flat, round, portable disc made of metal, plastic and lacquer that is written and read by a laser.
stores data in deformities
Types of optical disc are
CD
DVD
BD
to store data, songs
CD-ROM
CD-R
CD-RW
used mainly as video and data storage
DVD-ROM
DVD-R
DVD-RW
to store high definition
BD-ROM
BD-R
BD-RE
Volatile Memory (RAM)
Store data temporarily
Directly accessible to the CPU.
Storage
Store data permanently
Contents copied to main memory before being accessed by CPU.