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Storage devices and media (Backing up of data (WHATS (disk, tape, flash…
Storage devices and media
Backing up of data
PRIMARY STORAGE
RAM
ROM
SECONDARY STORAGE
byte size
storage size
WHATS
disk
tape
flash drive
WHY
to safeguad against loss of data
To safeguard against hackers
backup against viruses
types of access
field
record
file
Serial access
Master file
keys
12345689
transaction file
keys :
12457810
different types of storage media
magnetic
optical
solid state
direct access
real time operation