backups and archives

types of backups and their advanatges and disadvantages, as well as types of back up and archiving

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Backups and archives
Media size example advantages Disadvantages
CD-RW 650mb Personal files or Small and Fragile- can
small systems portable, fairly snap or be
inexpensive, easily
fast access to scratched,
data relatively small
capacity- could
not be used to
back up a
network or a
large system
DVD-RW 4.7 Gb Personal files or Fairly large Doesn't work on
small systems storage CD drives, can
capacity, be damaged by
inexpensive to breaking or
purchase, most scratching,
PC's contain a probably won't
DVD RW drive be large enough
to back up a
network or
Flash memory Up to 16 Gb Personal files or Easily portable, Storage per
small systems hold large megabyte is
amounts of more expensive
data, more than any other
reliable than type of media,
floppy disks they can be
and less fragile easily lost, the
than CDs or metal part can
DVDs be easily
snapped off
Magnetic tape Over 100 Gb per Personal system Relatively cheap Serial access
tape or network per megabyte can be quite
of storage, can slow to access
store large data, need
amounts of special
data- usually equipment to
the whole record and read
network, can be data on the
set to back up tape
External hard Up to 1000 Gb Personal data Robust storage
drive device,
storage per
megabyte than
any other

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Backups and archives
media, can back
up the whole
system or
Cloud storage unlimited Personal data Accessible from Could take a
anywhere long time to
download a
large amount of
data, may take
a long time to
upload the data
in the first
place.…read more

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Backups and archives
Advantages- you have a permanent record or source of the data files that
are no longer in use, reduces data which is stored on the network or system
thus making it faster to back up, network storage space is expensive- by
archiving data it frees up space for data or files that are currently in use,
improves performance of the system since less files stored
Disadvantages- when files are backed up the original data still remains on
the system.…read more


Mr A Gibson

A decent overview of different media which can be used for backup and types of backup strategy. This could be used as a reference guide but also to use as a base for making more detailed notes for example adding costs or specific examples.

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