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Examples
of
physical
recovery
procedures
are:
removing
a
damaged
PCB
printed
circuit
board
and
replacing
it with
a
matching
PCB from
a
healthy
drive
this
often
entails
the
movement
of a
microchip
from the
original
board to
the
replacement,
Changing
the
original
damaged
read/write
head
assembly
with
matching
parts
from a
healthy
drive,
removing
the hard
disk
platters
from the
original
damaged
drive
and
installing
them
into a
healthy
drive,
and
often a
combination
of all
of these
procedures.
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Far more common than
physical damage is
logical damage to a
file system. Logical
damage is primarily
caused by power
outages that prevent
file system
structures from
being completely
written to the
storage medium, but
problems with
hardware and
drivers, as well as
system crashes, can
have the same
effect. The result
is that the file
system is left in an
inconsistent state.
This can cause a
variety of problems,
such as strange
behavior , system
crashes, or an
actual loss of data.
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