Notes:
Quotations
are provided after detailed examination during Evaluation
Phase
Logical
Failures: Usually
caused by mis-operation by men or system, and make the data
cannot be read because of incompletion of logic integration.
Usually, the data storage device (hard disk, USB disk, etc.)
can be recognized by the computer
Physical
Failures: The
data storage device is physically damaged, such as damage
of magnetic head of the hard disk, PCB board, parts and etc,
so data cannot read. Usually, appears as the data storage
devices cannot be recognized by the computer