<s>
Data	B-Error_Name
Integrity	I-Error_Name
Field	I-Error_Name
(	O
DIF	O
)	O
is	O
an	O
approach	O
to	O
protect	O
data	O
integrity	O
in	O
computer	B-General_Concept
data	I-General_Concept
storage	I-General_Concept
from	O
data	O
corruption	O
.	O
</s>
<s>
Data	O
availability	O
in	O
storage	B-General_Concept
systems	I-General_Concept
is	O
frequently	O
measured	O
simply	O
in	O
terms	O
of	O
the	O
reliability	O
of	O
the	O
hardware	O
components	O
and	O
the	O
effects	O
of	O
redundant	O
hardware	O
.	O
</s>
<s>
But	O
the	O
reliability	O
of	O
the	O
software	O
,	O
its	O
ability	O
to	O
detect	O
errors	O
,	O
and	O
its	O
ability	O
to	O
correctly	O
report	O
or	O
apply	O
corrective	O
actions	O
to	O
a	O
failure	O
have	O
a	O
significant	O
bearing	O
on	O
the	O
overall	O
storage	B-General_Concept
system	I-General_Concept
availability	O
.	O
</s>
<s>
The	O
controller	O
could	O
be	O
RAID	B-Architecture
controller	O
or	O
simple	O
storage	O
switches	O
.	O
</s>
<s>
DIF	O
included	O
extending	O
the	O
disk	B-Application
sector	I-Application
from	O
its	O
traditional	O
512	B-Application
bytes	I-Application
,	O
to	O
520	O
bytes	O
,	O
by	O
adding	O
eight	O
additional	O
protection	O
bytes	O
.	O
</s>
<s>
This	O
extended	O
sector	O
is	O
defined	O
for	O
Small	B-Architecture
Computer	I-Architecture
System	I-Architecture
Interface	I-Architecture
(	O
SCSI	B-Architecture
)	O
devices	O
,	O
which	O
is	O
in	O
turn	O
used	O
in	O
many	O
enterprise	O
storage	O
technologies	O
,	O
such	O
as	O
Fibre	B-Architecture
Channel	I-Architecture
.	O
</s>
<s>
Oracle	B-Application
Corporation	I-Application
included	O
support	O
for	O
DIF	O
in	O
the	O
Linux	B-Operating_System
kernel	I-Operating_System
.	O
</s>
