<s>
The	O
subject	O
of	O
computer	O
backups	B-Application
is	O
rife	O
with	O
jargon	O
and	O
highly	O
specialized	O
terminology	O
.	O
</s>
<s>
This	O
page	O
is	O
a	O
glossary	B-Device
of	I-Device
backup	I-Device
terms	I-Device
that	O
aims	O
to	O
clarify	O
the	O
meaning	O
of	O
such	O
jargon	O
and	O
terminology	O
.	O
</s>
<s>
The	O
idea	O
that	O
a	O
minimal	O
backup	B-Application
solution	O
should	O
include	O
three	O
copies	O
of	O
the	O
data	O
,	O
including	O
two	O
local	O
copies	O
and	O
one	O
remote	O
copy	O
.	O
</s>
<s>
an	O
organization	O
's	O
procedures	O
and	O
rules	O
for	O
ensuring	O
that	O
adequate	O
numbers	O
and	O
types	O
of	O
backups	B-Application
are	O
made	O
,	O
including	O
suitably	O
frequent	O
testing	O
of	O
the	O
process	O
for	O
restoring	O
the	O
original	O
production	O
system	O
from	O
the	O
backup	B-Application
copies	O
.	O
</s>
<s>
a	O
method	O
for	O
effectively	O
backing	O
up	O
data	O
where	O
multiple	O
media	O
are	O
systematically	O
moved	O
from	O
storage	O
to	O
usage	O
in	O
the	O
backup	B-Application
process	O
and	O
back	O
to	O
storage	O
.	O
</s>
<s>
Such	O
a	O
site	O
may	O
have	O
ready	O
access	O
to	O
the	O
backups	B-Application
or	O
possibly	O
even	O
a	O
continuously	O
updated	O
mirror	O
.	O
</s>
<s>
computer	O
software	O
applications	O
that	O
are	O
used	O
for	O
performing	O
the	O
backing	O
up	O
of	O
data	O
,	O
i.e.	O
,	O
the	O
systematic	O
generation	O
of	O
backup	B-Application
copies	O
.	O
</s>
<s>
See	O
also	O
:	O
List	B-Application
of	I-Application
backup	I-Application
software	I-Application
.	O
</s>
<s>
the	O
period	O
of	O
time	O
that	O
a	O
system	O
is	O
available	O
to	O
perform	O
a	O
backup	B-Application
procedure	O
.	O
</s>
<s>
Backup	B-Application
procedures	O
can	O
have	O
detrimental	O
effects	O
to	O
system	O
and	O
network	O
performance	O
,	O
sometimes	O
requiring	O
the	O
primary	O
use	O
of	O
the	O
system	O
to	O
be	O
suspended	O
.	O
</s>
<s>
These	O
effects	O
can	O
be	O
mitigated	O
by	O
arranging	O
a	O
backup	B-Application
window	O
with	O
the	O
users	O
or	O
owners	O
of	O
the	O
system(s )	O
.	O
</s>
<s>
This	O
is	O
found	O
in	O
the	O
backup	B-Application
with	O
Windows	O
2003	O
.	O
</s>
<s>
a	O
cumulative	O
backup	B-Application
of	O
all	O
changes	O
made	O
since	O
the	O
last	O
full	O
backup	B-Application
.	O
</s>
<s>
The	O
advantage	O
to	O
this	O
is	O
the	O
quicker	O
recovery	O
time	O
,	O
requiring	O
only	O
a	O
full	O
backup	B-Application
and	O
the	O
latest	O
differential	B-General_Concept
backup	I-General_Concept
to	O
restore	O
the	O
system	O
.	O
</s>
<s>
The	O
disadvantage	O
is	O
that	O
for	O
each	O
day	O
elapsed	O
since	O
the	O
last	O
full	O
backup	B-Application
,	O
more	O
data	O
needs	O
to	O
be	O
backed	O
up	O
,	O
especially	O
if	O
a	O
majority	O
of	O
the	O
data	O
has	O
been	O
changed	O
.	O
</s>
<s>
One	O
of	O
the	O
main	O
purposes	O
of	O
creating	O
backups	B-Application
is	O
to	O
facilitate	O
a	O
successful	O
disaster	B-General_Concept
recovery	I-General_Concept
.	O
</s>
<s>
For	O
maximum	O
effectiveness	O
,	O
this	O
process	O
should	O
be	O
planned	O
in	O
advance	O
and	O
audited	B-General_Concept
.	O
</s>
<s>
the	O
process	O
of	O
copying	O
the	O
contents	O
of	O
one	O
computer	O
hard	O
disk	O
to	O
another	O
disk	O
or	O
to	O
an	O
image	O
file	O
(	O
see	O
disk	B-Application
image	I-Application
below	O
)	O
for	O
later	O
recovery	O
.	O
</s>
<s>
a	O
backup	B-Application
of	O
all	O
(	O
selected	O
)	O
files	O
on	O
the	O
system	O
.	O
</s>
<s>
In	O
contrast	O
to	O
a	O
drive	B-Application
image	I-Application
,	O
this	O
does	O
not	O
included	O
the	O
file	O
allocation	O
tables	O
,	O
partition	O
structure	O
and	O
boot	O
sectors	O
.	O
</s>
<s>
a	O
backup	B-Application
of	O
a	O
database	O
that	O
is	O
still	O
running	O
,	O
and	O
so	O
changes	O
may	O
be	O
made	O
to	O
the	O
data	O
while	O
it	O
is	O
being	O
backed	O
up	O
.	O
</s>
<s>
This	O
can	O
be	O
used	O
to	O
resolve	O
changes	O
made	O
during	O
the	O
backup	B-Application
.	O
</s>
<s>
a	O
backup	B-Application
that	O
only	O
contains	O
the	O
files	O
that	O
have	O
changed	O
since	O
the	O
most	O
recent	O
backup	B-Application
(	O
either	O
full	O
or	O
incremental	O
)	O
.	O
</s>
<s>
The	O
advantage	O
of	O
this	O
is	O
quicker	O
backup	B-Application
times	O
,	O
as	O
only	O
changed	O
files	O
need	O
to	O
be	O
saved	O
.	O
</s>
<s>
The	O
disadvantage	O
is	O
longer	O
recovery	O
times	O
,	O
as	O
the	O
latest	O
full	O
backup	B-Application
,	O
and	O
all	O
incremental	B-General_Concept
backups	I-General_Concept
up	O
to	O
the	O
date	O
of	O
data	O
loss	O
need	O
to	O
be	O
restored	O
.	O
</s>
<s>
sometimes	O
a	O
backup	B-Application
job	O
is	O
larger	O
than	O
a	O
single	O
destination	O
storage	O
medium	O
.	O
</s>
<s>
the	O
practice	O
of	O
combining	O
multiple	O
backup	B-Application
data	O
streams	O
into	O
a	O
single	O
stream	O
that	O
can	O
be	O
written	O
to	O
a	O
single	O
storage	O
device	O
.	O
</s>
<s>
the	O
practice	O
of	O
creating	O
multiple	O
backup	B-Application
data	O
streams	O
from	O
a	O
single	O
system	O
to	O
multiple	O
storage	O
devices	O
.	O
</s>
<s>
full	O
backup	B-Application
used	O
by	O
Windows	O
Server	O
2003	O
.	O
</s>
<s>
provisionally	O
backing	O
up	O
data	O
to	O
a	O
local	O
staging	O
backup	B-Application
device	O
,	O
possibly	O
for	O
later	O
archival	O
backup	B-Application
to	O
a	O
remote	O
store	O
device	O
.	O
</s>
<s>
See	O
File	B-Application
locking	I-Application
.	O
</s>
<s>
backing	O
up	O
data	O
to	O
an	O
offsite	O
permanent	O
backup	B-Application
facility	O
,	O
either	O
directly	O
from	O
the	O
live	O
data	O
source	O
or	O
else	O
from	O
an	O
intermediate	O
near	O
store	O
device	O
.	O
</s>
<s>
the	O
amount	O
of	O
time	O
required	O
to	O
bring	O
a	O
desired	O
data	O
set	O
back	O
from	O
the	O
backup	B-Application
media	O
.	O
</s>
<s>
Some	O
backup	B-Application
products	O
rely	O
on	O
daily	O
copies	O
of	O
data	O
and	O
measure	O
retention	O
in	O
terms	O
of	O
days	O
.	O
</s>
<s>
backup	B-Application
,	O
over	O
the	O
internet	O
,	O
to	O
an	O
offsite	O
location	O
under	O
the	O
user	O
's	O
control	O
.	O
</s>
<s>
Similar	O
to	O
remote	O
backup	B-Application
except	O
that	O
the	O
owner	O
of	O
the	O
data	O
maintains	O
control	O
of	O
the	O
storage	O
location	O
.	O
</s>
<s>
a	O
restorable	O
backup	B-Application
image	O
that	O
is	O
synthesized	O
on	O
the	O
backup	B-Application
server	O
from	O
a	O
previous	O
full	O
backup	B-Application
and	O
all	O
the	O
incremental	B-General_Concept
backups	I-General_Concept
since	O
then	O
.	O
</s>
<s>
It	O
is	O
equivalent	O
to	O
what	O
a	O
full	O
backup	B-Application
would	O
be	O
if	O
it	O
were	O
taken	O
at	O
the	O
time	O
of	O
the	O
last	O
incremental	B-General_Concept
backup	I-General_Concept
.	O
</s>
<s>
a	O
storage	O
device	O
that	O
appears	O
to	O
be	O
a	O
tape	B-Device
library	I-Device
to	O
backup	B-Application
software	I-Application
,	O
but	O
actually	O
stores	O
data	O
by	O
some	O
other	O
means	O
.	O
</s>
