storage devices Flashcards
(6 cards)
Hard disk
type:Magnetic
capcity: very high
speed of access: Slow
portability: External hard disks are portable. internal devices are fixed.
durability: Reasonable, but prone to damage if dropped or knocked
reliability: Generally very reliable if looked after
typical use: Long-term storage of programs and data
CD-ROM/R and CD-RW
type:optical
capacity: 640 mb
speed of access: very slow
portability: very portable
durability: easily scratched damdaged or broken
reliability:generally very reliable if looked after
typical use: back ups, archives
DVD-ROM/R and DVD-RW
type: optical
capacity: 4.7gb
speed of access: slow
portability: very portable
durability: easily scratched or damaged or broken
reliability: generally very reliable
typical use: backups of copies of data distribution of games, tv programmes and movies
Blu-ray-ROM/R and Blu-ray-RW
type: Optical
capacity: 50 GB
speed of access: Slow
portability: Very portable
durability: Easily scratched, damaged or broken
reliability:Generally very reliable if looked after
typical use: Distribution of TV shows and movies for Blu-ray-ROM/R and backups, archives for Blu-ray-RW
Solid-state drive
type:Flash memory
capacity:256 GB-4 TB
speed of access: Very fast
portability: Internal devices are fixed. External hard disks are portable
durability: Robust and resilient
reliability:Reliable
typical use: Long-term storage of programs and data where high performance is required
USB memory stick
type:Flash memory
capacity: 2 GB-2 TB
speed of access: Fast
portability: Very portable
durability: Robust and resilient
reliability:Reliable
typical use: Copies of data, transferring files between computers
