Optical media - such as the compact disk - are storage media that hold content in digital form and that are written and read by a laser eg. Floppy disk
Magnetic - any storage medium in which different patterns of magnetization are used to represent stored bits or bytes of information; "the hard disk in you computer is magnetic storage" eg.Hard drive, Floppy drive, Data Tape backup, MiniDV tape, Stripe on the back of a credit or debit card
Solid-state storage is a nonvolatile, removable storage medium that employs integrated circuits[ICs] rather than magnetic or optical media. It is the equivalent of large-capacity,nonvolatile memory.
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Device
Uses
Advantage
Disadvantage
Fixed hard discs
Used to store operating systems, software and working data. Any
application which requires very fast access to data for both reading and
writing to. Not for applications which need portability. Used for online
and real time processes requiring direct access. Used in file servers
for computer networks
Portable hard discs
Used to store very large files which need transporting from one
computer to another and price is not an issue. More expensive than
other forms of removable media
Magnetic tapes
Any application which requires extremely large storage capacity and
speed of access is not an issue. Uses serial access for reading and
writing. Used for backups of file servers for computer networks. Used
in a variety of batch processing applications such as reading of bank
cheques, payroll processing and general stock control
Optical backing storage media
such as CDs and DVDs
CDs tend to be used for large files (but smaller than 1Gb) which are
too big for a floppy disc to hold such as music and general animation.
DVDs are used to hold very large files (several Gb) such as films. Both
CDs and DVDs are portable i.e. they can be transported from one
computer to another. Both can be used to store computer data
CD ROM/DVD ROM
Applications which require the prevention of deletion of data,
accidental or otherwise. CDs used by software companies for
distributing software programs and data; by music companies for
distributing music albums and by book publishers for distributing
encyclopaedias, reference books etc. DVDs used by film distributors
CD R/DVD R
Applications which require a single ‘burning’ of data, e.g. CDs –
recording of music downloads from the internet, recording of music
from MP3 format, recording of data for archiving or backup purposes.
DVDs – recording of films and television programs
Storage Device
3 Kind of Storage Devices:
Credit: searchstorage.techtarget.com
Device
Uses
Advantage
Disadvantage
application which requires very fast access to data for both reading and
writing to. Not for applications which need portability. Used for online
and real time processes requiring direct access. Used in file servers
for computer networks
computer to another and price is not an issue. More expensive than
other forms of removable media
speed of access is not an issue. Uses serial access for reading and
writing. Used for backups of file servers for computer networks. Used
in a variety of batch processing applications such as reading of bank
cheques, payroll processing and general stock control
such as CDs and DVDs
too big for a floppy disc to hold such as music and general animation.
DVDs are used to hold very large files (several Gb) such as films. Both
CDs and DVDs are portable i.e. they can be transported from one
computer to another. Both can be used to store computer data
accidental or otherwise. CDs used by software companies for
distributing software programs and data; by music companies for
distributing music albums and by book publishers for distributing
encyclopaedias, reference books etc. DVDs used by film distributors
recording of music downloads from the internet, recording of music
from MP3 format, recording of data for archiving or backup purposes.
DVDs – recording of films and television programs