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Recovery
is also
related
to the
type of
Data
Loss
Event.
Recovering
a single
lost
file is
going to
be
substantially
different
than
recovering
a whole
system
that was
destroyed
in a
flood.
An
effective
backup
regimen
will
have
some
proportionality
between
the
magnitude
of Data
Loss and
the
magnitude
of
effort
required
to
recover.
For
example,
it
should
be far
easier
to
restore
the
single
lost
file
than to
recover
the
whole
system
destroyed
in a
flood.
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There are commercial
services that
attempt to recover
data from physically
damaged media. These
services are
typically very
expensive.
Filesystem
corruption can
usually be repaired
by the user or the
system administrator
with the right
software tools. A
deleted file is
rarely overwritten
on disk; it is more
usual for the
operating system to
simply delete its
entry in the
filesystem index.
This can be easily
reversed.
Data recovery is the
process of salvaging
data from damaged,
failed, corrupted,
or inaccessible
secondary storage
media when it cannot
be accessed
normally. Often the
data are being
salvaged from
storage media
formats such as hard
disk drives, storage
tapes, CDs, DVDs,
RAID, and other
electronics.
Recovery may be
required due to
physical damage to
the storage device
or logical damage to
the file system that
prevents it from
being mounted by the
host operating
system. Although
there is some
confusion as to the
term, data recovery
can also be the
process of
retrieving and
securing deleted
information from a
storage media for
forensic purposes or
spying.
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