26
Tabel 2.3 Keuntungan dan Kerugian Media Secondary Storage
Type
Advan tages
Dis advan tages
Appli cati on
Magnet ic
t
apes
Lowest cost per unit
st ored.
Se quent ial access
means slow ret rieval
speeds.
Corporat e dat a
archiving
Hard drive
Relat ively high capacit y
and fast ret rieval speed.
Fragile: high cost per
unit
st ored.
P
ersonal comput ers
t
hrough
mainframes.
RAID
High capacity: designed
risk
of
data
loss: low
cost
to
minimize per
unit
st ored
Expensive, semi-
permanent inst allat ion
Corporat e dat a
st orage that
requires frequent ,
rapid access
Magnet ic
diskett es
Low cost per disket tes,
portability
Low capacit y: very
high cost per unit
st ored: fragile
P
ersonal comput er
CD-ROM
High capacity: moderat e
cost per unit
st ored: high
durabilit y
Slo wer retrieval
speeds t han hard
drives: only cert ain
t
ypes can be rewritt en
P
ersonal comput er
t
hrough corporate
dat a st orage
 |