<s>
Clariion	B-Operating_System
(	O
styled	O
CLARiiON	B-Operating_System
)	O
is	O
a	O
discontinued	O
SAN	O
disk	B-General_Concept
array	I-General_Concept
manufactured	O
and	O
sold	O
by	O
EMC	O
Corporation	O
,	O
it	O
occupied	O
the	O
entry-level	O
and	O
mid-range	O
of	O
EMC	O
's	O
SAN	O
disk	B-General_Concept
array	I-General_Concept
products	O
.	O
</s>
<s>
In	O
2011	O
,	O
EMC	O
introduced	O
the	O
EMC	O
VNX	O
Series	O
,	O
designed	O
to	O
replace	O
both	O
the	O
Clariion	B-Operating_System
and	O
Celerra	O
products	O
.	O
</s>
<s>
Upon	O
launch	O
in	O
2008	O
,	O
the	O
latest	O
generation	O
CX4	O
series	O
storage	B-General_Concept
arrays	I-General_Concept
supported	O
fibre	B-Architecture
channel	I-Architecture
and	O
iSCSI	B-Protocol
front	O
end	O
bus	O
connectivity	O
.	O
</s>
<s>
The	O
fibre	B-Architecture
channel	I-Architecture
back	O
end	O
bus	O
offered	O
4	O
Gbit/s	O
of	O
bandwidth	O
with	O
FC-SCSI	O
disks	O
or	O
SATAII	O
disks	O
.	O
</s>
<s>
The	O
EMC	O
Celerra	O
NAS	B-Application
device	O
is	O
based	O
on	O
the	O
same	O
X-blade	O
architecture	O
as	O
the	O
CLARiiON	B-Operating_System
storage	O
processor	O
.	O
</s>
<s>
The	O
first	O
CLARiiON	B-Operating_System
was	O
developed	O
in	O
1992	O
by	O
Data	O
General	O
Corporation	O
,	O
one	O
of	O
the	O
first	O
minicomputer	B-Architecture
companies	O
.	O
</s>
<s>
CLARiiON	B-Operating_System
was	O
an	O
early	O
commercial	O
example	O
of	O
a	O
RAID	B-Architecture
product	O
and	O
initially	O
sold	O
exclusively	O
as	O
an	O
array	O
with	O
the	O
company	O
's	O
Aviion	B-Device
line	O
of	O
computer	O
systems	O
as	O
the	O
HADA	O
(	O
High	O
Availability	O
Disk	B-General_Concept
Array	I-General_Concept
)	O
and	O
later	O
the	O
HADA	O
II	O
before	O
being	O
made	O
available	O
for	O
broader	O
open	O
systems	O
attachment	O
and	O
renamed	O
CLARiiON	B-Operating_System
in	O
1994	O
.	O
</s>
<s>
Realizing	O
the	O
enormous	O
potential	O
of	O
storage	B-General_Concept
arrays	I-General_Concept
,	O
Data	O
General	O
created	O
a	O
separate	O
Clariion	B-Operating_System
division	O
and	O
began	O
selling	O
the	O
product	O
as	O
an	O
OEM	O
offering	O
to	O
its	O
systems	O
competitors	O
.	O
</s>
<s>
While	O
this	O
somewhat	O
lessened	O
the	O
advantages	O
of	O
Aviion	B-Device
in	O
the	O
marketplace	O
,	O
and	O
was	O
a	O
source	O
of	O
internal	O
corporate	O
friction	O
,	O
it	O
allowed	O
the	O
company	O
to	O
sell	O
higher	O
volumes	O
and	O
popularize	O
the	O
brand	O
.	O
</s>
<s>
The	O
strategy	O
paid	O
dividends	O
as	O
the	O
company	O
was	O
acquired	O
by	O
EMC	O
in	O
1999	O
,	O
primarily	O
for	O
the	O
CLARiiON	B-Operating_System
line	O
of	O
products	O
.	O
</s>
<s>
In	O
2011	O
,	O
EMC	O
introduced	O
the	O
new	O
VNX	O
series	O
of	O
unified	O
storage	O
disk	B-General_Concept
arrays	I-General_Concept
intended	O
to	O
replace	O
both	O
CLARiiON	B-Operating_System
and	O
Celerra	O
products	O
.	O
</s>
<s>
In	O
early	O
2012	O
,	O
both	O
CLARiiON	B-Operating_System
and	O
Celerra	O
were	O
discontinued	O
.	O
</s>
<s>
The	O
Clariion	B-Operating_System
disk	B-General_Concept
array	I-General_Concept
project	O
started	O
in	O
the	O
early	O
1990s	O
when	O
Tom	O
West	O
(	O
the	O
protagonist	O
of	O
the	O
Pulitzer	O
Prize	O
winning	O
book	O
The	O
Soul	O
of	O
a	O
New	O
Machine	O
)	O
convinced	O
Data	O
General	O
to	O
develop	O
the	O
array	O
.	O
</s>
<s>
West	O
realized	O
the	O
potential	O
for	O
more	O
advanced	O
and	O
openly	O
compatible	O
data-storage	O
devices	O
,	O
as	O
did	O
competitors	O
such	O
as	O
Digital	O
Equipment	O
Corporation	O
with	O
their	O
StorageWorks	B-Device
product	O
.	O
</s>
<s>
Patented	O
in	O
1994	O
,	O
the	O
Clariion	B-Operating_System
disk	B-General_Concept
array	I-General_Concept
had	O
some	O
interesting	O
features	O
that	O
later	O
became	O
standard	O
in	O
the	O
data-storage	O
and	O
computing	O
industry	O
.	O
</s>
<s>
Features	O
mentioned	O
in	O
the	O
patent	O
paperwork	O
included	O
optional	O
hot	B-Device
swapping	I-Device
,	O
guide	O
rails	O
for	O
proper	O
electrical	O
contact	O
,	O
and	O
a	O
method	O
to	O
lock	O
the	O
drives	O
in	O
place	O
once	O
they	O
were	O
secured	O
in	O
the	O
disk	O
enclosure	O
.	O
</s>
<s>
The	O
Clariion	B-Operating_System
line	O
was	O
soon	O
extended	O
to	O
contain	O
SCSI	O
disk	B-General_Concept
arrays	I-General_Concept
ranging	O
from	O
7	O
to	O
30	O
slots	O
.	O
</s>
<s>
In	O
1997	O
,	O
Data	O
General	O
's	O
Clariion	B-Operating_System
division	O
took	O
the	O
unusual	O
step	O
of	O
adopting	O
an	O
emerging	O
standard	O
—	O
Fibre	B-Architecture
Channel	I-Architecture
.	O
</s>
<s>
The	O
FC5000	O
array	O
utilized	O
a	O
Fibre	B-Architecture
Channel	I-Architecture
Arbitrated	I-Architecture
Loop	I-Architecture
connection	O
that	O
doubled	O
the	O
performance	O
of	O
SCSI	O
arrays	O
at	O
that	O
time	O
.	O
</s>
<s>
It	O
was	O
also	O
the	O
first	O
to	O
use	O
RAID	B-Architecture
level	O
5	O
on	O
Fibre	B-Architecture
Channel	I-Architecture
drives	O
.	O
</s>
<s>
From	O
there	O
,	O
the	O
Clariion	B-Operating_System
range	O
grew	O
into	O
a	O
faster	O
,	O
more	O
expandable	O
midrange	O
storage	O
platform	O
,	O
culminating	O
in	O
the	O
FC5700	O
under	O
Data	O
General	O
.	O
</s>
<s>
After	O
EMC	O
's	O
acquisition	O
of	O
Data	O
General	O
,	O
significant	O
development	O
of	O
a	O
new	O
range	O
of	O
Clariion	B-Operating_System
arrays	O
took	O
place	O
,	O
resulting	O
in	O
the	O
FC4500	O
and	O
FC4700	O
.	O
</s>
<s>
Within	O
a	O
couple	O
of	O
years	O
,	O
the	O
first	O
CX	O
series	O
of	O
Clariions	B-Operating_System
(	O
CX200	O
,	O
CX400	O
and	O
CX600	O
)	O
was	O
developed	O
.	O
</s>
<s>
Subsequent	O
processor	O
and	O
bandwidth	O
upgrades	O
led	O
to	O
a	O
new	O
CX	O
lineup	O
(	O
CX300	O
,	O
CX500	O
,	O
CX700	O
)	O
and	O
a	O
low	O
end	O
SATA	O
based	O
Clariion	B-Operating_System
array	O
,	O
the	O
AX100	O
(	O
now	O
updated	O
to	O
AX150	O
)	O
.	O
</s>
<s>
In	O
2003	O
,	O
Clariion	B-Operating_System
became	O
the	O
industry	O
's	O
first	O
NEBS-certified	O
storage	O
system	O
.	O
</s>
<s>
In	O
May	O
2006	O
,	O
EMC	O
introduced	O
the	O
third	O
generation	O
of	O
Clariion	B-Operating_System
,	O
named	O
CX3	O
UltraScale	O
.	O
</s>
<s>
The	O
lineup	O
,	O
consisting	O
of	O
the	O
CX3-20	O
,	O
CX3-40	O
and	O
CX3-80	O
,	O
was	O
the	O
industry	O
's	O
only	O
storage	O
platform	O
to	O
leverage	O
end-to-end	O
4	O
Gbit/s	O
(	O
4	O
billion	O
bits	O
per	O
second	O
)	O
Fibre	B-Architecture
Channel	I-Architecture
and	O
PCI-Express	O
technologies	O
.	O
</s>
<s>
Most	O
newer	O
Clariion	B-Operating_System
models	O
up	O
to	O
the	O
CX-4	O
run	O
a	O
version	O
of	O
Windows	O
XP	O
Embedded	O
.	O
</s>
<s>
The	O
Clariion	B-Operating_System
is	O
built	O
on	O
an	O
Intel	O
platform	O
and	O
has	O
quite	O
unique	O
software	O
layer	O
:	O
it	O
runs	O
two	O
operating	O
environments	O
in	O
parallel	O
.	O
</s>
<s>
Embedded	O
Windows	O
(	O
in	O
the	O
fourth	O
generation	O
this	O
is	O
64-bit	O
Windows	O
Storage	B-Application
Server	I-Application
,	O
the	O
third	O
generation	O
used	O
32-bit	O
Windows	O
XP	O
)	O
.	O
</s>
<s>
Storage	O
is	O
connected	O
via	O
back-end	O
loops	O
with	O
up	O
to	O
120	O
drives	O
per	O
loop	O
,	O
the	O
drives	O
are	O
contained	O
in	O
Disk	B-General_Concept
Array	I-General_Concept
Enclosures	O
(	O
DAEs	O
)	O
of	O
15	O
drives	O
each	O
.	O
</s>
<s>
Management	O
of	O
the	O
Clariion	B-Operating_System
is	O
usually	O
through	O
inbuilt	O
Java-based	O
management	O
software	O
called	O
Navisphere	O
.	O
</s>
<s>
Advanced	O
functionality	O
of	O
the	O
Clariion	B-Operating_System
is	O
licensed	O
and	O
enabled	O
through	O
software	O
.	O
</s>
<s>
This	O
includes	O
SAN	O
replication	O
,	O
Quality	O
of	O
service	O
(	O
QOS	O
)	O
and	O
snapshots	B-Application
.	O
</s>
<s>
The	O
CLARiiON	B-Operating_System
was	O
a	O
dual	O
controller	O
active/passive	O
array	O
,	O
meaning	O
that	O
it	O
had	O
a	O
mirrored	O
write	O
cache	O
,	O
but	O
only	O
one	O
controller	O
was	O
actively	O
serving	O
requests	O
for	O
any	O
single	O
LUN	O
presented	O
to	O
initiators	O
.	O
</s>
<s>
The	O
AX	O
series	O
is	O
considered	O
the	O
entry-level	O
disk	B-General_Concept
array	I-General_Concept
.	O
</s>
<s>
The	O
AX150	O
supports	O
up	O
to	O
12	O
Serial	O
ATA	O
disks	O
with	O
either	O
250	O
,	O
500	O
or	O
750	O
GB	O
(	O
1	O
GB	O
=	O
109	O
B	B-Application
)	O
at	O
a	O
throughput	O
of	O
150	O
(	O
250	O
GB	O
disks	O
)	O
or	O
300	O
MB/s	O
(	O
500	O
,	O
750	O
GB	O
disks	O
)	O
and	O
,	O
optionally	O
,	O
NCQ	O
.	O
</s>
<s>
Supported	O
RAID	B-Architecture
levels	O
are	O
RAID	B-Architecture
5	O
(	O
with	O
min	O
.	O
</s>
<s>
3	O
disks	O
)	O
and	O
RAID	B-Architecture
1/0	O
(	O
min	O
.	O
</s>
<s>
The	O
Fibre	B-Architecture
Channel	I-Architecture
connection	O
supports	O
transfer	O
speeds	O
of	O
up	O
to	O
2	O
Gbit/s	O
(	O
with	O
both	O
AL	B-Architecture
and	O
SW	B-Architecture
configurations	O
)	O
,	O
iSCSI	B-Protocol
is	O
physically	O
limited	O
to	O
max	O
.	O
</s>
<s>
Similar	O
to	O
the	O
AX150	O
it	O
is	O
available	O
in	O
iSCSI	B-Protocol
or	O
Fibre	B-Architecture
Channel	I-Architecture
configurations	O
.	O
</s>
<s>
Opposed	O
to	O
the	O
AX150	O
the	O
AX4	O
supports	O
Fibre	B-Architecture
Channel	I-Architecture
transfer	O
speeds	O
of	O
up	O
to	O
4	O
Gbit/s	O
.	O
</s>
<s>
The	O
CX	O
series	O
supports	O
both	O
SATA	O
and	O
Fibre	B-Architecture
Channel	I-Architecture
disks	O
.	O
</s>
<s>
Supported	O
RAID	B-Architecture
levels	O
are	O
1/0	O
,	O
0	O
,	O
1	O
,	O
3	O
,	O
5	O
,	O
and	O
6	O
;	O
the	O
disks	O
can	O
be	O
configured	O
into	O
groups	O
with	O
different	O
RAID	B-Architecture
levels	O
.	O
</s>
<s>
Models	O
of	O
the	O
CX	O
series	O
come	O
in	O
two	O
configurations	O
:	O
Fibre	B-Architecture
Channel	I-Architecture
(	O
transfer	O
speeds	O
max	O
.	O
</s>
<s>
2	O
Gbit/s	O
)	O
and	O
iSCSI	B-Protocol
(	O
max	O
.	O
</s>
<s>
The	O
names	O
of	O
the	O
iSCSI	B-Protocol
models	O
end	O
with	O
an	O
i	O
,	O
e.g.	O
</s>
<s>
capacity	O
(	O
1	O
TB	O
=	O
1012	O
B	B-Application
)	O
CX300	O
64	O
60	O
365	O
GB	O
27	O
TB	O
CX500	O
128	O
120	O
4	O
TB	O
59	O
TB	O
CX700	O
256	O
240	O
4	O
TB(? )	O
</s>
<s>
The	O
CX4	O
UltraFlex	O
series	O
contains	O
multiple	O
models	O
which	O
differ	O
in	O
the	O
maximum	O
number	O
of	O
disks	O
(	O
SATA	O
or	O
Fibre	B-Architecture
Channel	I-Architecture
)	O
and	O
the	O
number	O
of	O
iSCSI	B-Protocol
and	O
FC	O
connections	O
.	O
</s>
<s>
The	O
PCI	O
Express	O
connection	O
between	O
the	O
FC	O
interface	O
and	O
the	O
storage	O
processor	O
allows	O
transfer	O
speeds	O
of	O
up	O
to	O
4	O
Gbit/s	O
,	O
while	O
iSCSI	B-Protocol
supports	O
speeds	O
of	O
max	O
.	O
</s>
<s>
All	O
current	O
models	O
support	O
RAID	B-Architecture
0	O
,	O
1	O
,	O
1/0	O
,	O
3	O
,	O
5	O
,	O
and	O
6	O
;	O
as	O
with	O
the	O
CX	O
series	O
,	O
groups	O
with	O
differing	O
RAID	B-Architecture
levels	O
can	O
be	O
created	O
.	O
</s>
<s>
Each	O
CX4	O
array	O
consists	O
of	O
dual	O
redundant	O
hot-swappable	B-Device
components	O
including	O
storage	O
processors	O
,	O
mirrored	O
cache	O
and	O
battery	O
backup	O
,	O
as	O
well	O
as	O
redundant	O
power	O
supplies	O
.	O
</s>
<s>
The	O
CX4	O
series	O
supports	O
Fibre	B-Architecture
Channel	I-Architecture
and	O
iSCSI	B-Protocol
host	O
connectivity	O
.	O
</s>
<s>
The	O
CX4-480	O
and	O
CX-960	O
support	O
fibre	B-Architecture
channel	I-Architecture
solid	O
state	O
flash	O
drives	O
introduced	O
by	O
EMC	O
for	O
the	O
Symmetrix	O
DMX-4	O
in	O
January	O
2008	O
.	O
</s>
<s>
The	O
product-agnostic	O
SLIC	O
I/O	O
cards	O
provide	O
more	O
flexibility	O
for	O
future	O
upgrades	O
as	O
new	O
technologies	O
become	O
available	O
,	O
such	O
as	O
8GBit	O
Fibre	B-Architecture
Channel	I-Architecture
and	O
10GBit	O
Ethernet/iSCSI	O
.	O
</s>
<s>
Model	O
Memory	O
Front-end	O
FC	O
ports	O
Front-end	O
iSCSI	B-Protocol
ports	O
Back-end	O
ports	O
Max	O
.	O
</s>
