Magnetic
Data is stored in concentric circles on the surface.
Hard Disk Drive
Cannot be written to.
CD-ROM/DVD-ROM
Quickly replacing HDD as the main storage in computers
Solid State Drive/SSD
Data is in a random order so the read/write head must move along the tape until it finds the requested colour.
serial access
Used to hold data written and read by storage devices.
What is a storage media?
Takes longer to access data, as data at the end of the tape takes longer to access
magnetic tape
Only recordable
CD-R/DVD-R
Small and compact, with a lot of storage.
pen drive/memory stick
Data is stored in alphabetical order, which means the read/writehead can fast-forward to the correct part of the tape
sequential/direct access
Used to write/read data on optical drives.
What is a laser?
Permanently connected to the computer
fixed HDD.
Read write, but with no permanent change?
CDRWs/DVD-RWs
Flat shape, and more suitable for smaller devices.
secure digital (SD) cards
A map of the sectors is stored on the HDD and is known as.
FAT
Have no moving parts, using flash memory.
What is SSD?
Allows an external backup of files
portable HDD.
Larger storage capacity than DVDs
Blu-ray
The limited number of read/write cycles.
Solid State/SSD
Easily scratched and data can be damaged.
Optical storage
A physical device that receives and retains electronic data for applications and users and makes the data available for retrieval.
What is a storage medium?