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Storage devices and media (Types of acess (file (Master file, Transaction…
Storage devices and media
Types of acess
field
Key field
Record
file
Master file
Transaction file
Serial acess
Direct acess
Used in online systems
Chemical plants
Backing up data
Primary Storage
RAM and ROM
Secondary storage
Backing up data
Copying of data and files
To safeguard against loss of data
To safeguard against hackers
In case files are accidentally deleted
Where it is stored
Kept in magnetic tape
In case the files need to be moved
Secondary storage media
Storage sizes
KB
1000 bytes
MB
1000000 bytes
GB
1 000 000 000 bytes
TB
1 000 000 000 000 Bytes