<s>
A	O
RAID	B-General_Concept
level	I-General_Concept
is	O
any	O
of	O
the	O
possible	O
configurations	O
of	O
a	O
RAID	B-Architecture
disk	B-General_Concept
array	I-General_Concept
.	O
</s>
<s>
RAID	B-Architecture
stands	O
for	O
redundant	B-Architecture
array	I-Architecture
of	I-Architecture
independent	I-Architecture
disks	I-Architecture
(	O
or	O
,	O
formerly	O
,	O
redundant	B-Architecture
array	I-Architecture
of	I-Architecture
inexpensive	I-Architecture
disks	I-Architecture
)	O
.	O
</s>
<s>
RAID	B-General_Concept
levels	I-General_Concept
may	O
refer	O
to	O
:	O
</s>
<s>
Non-standard	B-General_Concept
RAID	I-General_Concept
levels	I-General_Concept
,	O
variants	O
of	O
standard	O
or	O
nested	B-General_Concept
RAID	I-General_Concept
levels	I-General_Concept
.	O
</s>
<s>
Non-standard	B-General_Concept
RAID	I-General_Concept
levels	I-General_Concept
deviate	O
from	O
the	O
standard	O
configurations	O
defined	O
by	O
the	O
Storage	O
Networking	O
Industry	O
Association	O
(	O
SNIA	O
)	O
.	O
</s>
