<s>
The	O
IBM	B-Device
XIV	I-Device
Storage	I-Device
System	I-Device
was	O
a	O
line	O
of	O
cabinet-size	O
disk	O
storage	B-Application
servers	I-Application
.	O
</s>
<s>
The	O
system	O
is	O
a	O
collection	O
of	O
modules	B-Architecture
,	O
each	O
of	O
which	O
is	O
an	O
independent	O
computer	O
with	O
its	O
own	O
memory	B-General_Concept
,	O
interconnections	O
,	O
disk	O
drives	O
,	O
and	O
other	O
subcomponents	O
,	O
laid	O
out	O
in	O
a	O
grid	O
and	O
connected	O
together	O
in	O
parallel	O
using	O
either	O
InfiniBand	B-Architecture
(	O
third	O
generation	O
systems	O
)	O
or	O
Ethernet	O
(	O
second	O
generation	O
systems	O
)	O
connections	O
.	O
</s>
<s>
Each	O
module	B-Architecture
has	O
an	O
x86	O
CPU	O
and	O
runs	O
a	O
software	O
platform	O
consisting	O
largely	O
of	O
a	O
modified	O
Linux	B-Operating_System
kernel	I-Operating_System
and	O
other	O
open	B-Application
source	I-Application
software	I-Application
.	O
</s>
<s>
The	O
XIV	O
storage	O
system	O
distributes	O
volumes	O
across	O
all	O
modules	B-Architecture
in	O
1	O
MiB	O
chunks	O
(	O
partitions	B-Application
)	O
so	O
that	O
all	O
of	O
the	O
modules	B-Architecture
 '	O
resources	O
are	O
used	O
evenly	O
.	O
</s>
<s>
For	O
robustness	O
,	O
each	O
logical	O
partition	B-Application
is	O
stored	O
in	O
at	O
least	O
two	O
copies	O
on	O
separate	O
modules	B-Architecture
,	O
so	O
that	O
if	O
a	O
part	O
of	O
a	O
disk	O
drive	O
,	O
an	O
entire	O
disk	O
drive	O
,	O
or	O
an	O
entire	O
module	B-Architecture
fails	O
,	O
the	O
data	O
is	O
still	O
available	O
.	O
</s>
<s>
One	O
can	O
increase	O
the	O
system	O
storage	O
capacity	O
by	O
adding	O
additional	O
modules	B-Architecture
.	O
</s>
<s>
When	O
one	O
adds	O
a	O
module	B-Architecture
,	O
the	O
system	O
automatically	O
redistributes	O
previously	O
stored	O
data	O
to	O
make	O
optimal	O
use	O
of	O
its	O
I/O	B-General_Concept
capacity	O
.	O
</s>
<s>
The	O
XIV	O
software	O
features	O
include	O
remote	O
mirroring	O
,	O
thin	B-General_Concept
provisioning	I-General_Concept
,	O
quality	O
of	O
service	O
controls	O
,	O
LDAP	B-Protocol
authentication	O
support	O
,	O
VMware	O
support	O
,	O
differential	O
,	O
writable	O
snapshots	O
,	O
online	O
volume	O
migration	O
between	O
two	O
XIV	O
systems	O
and	O
encryption	O
protecting	O
data	B-General_Concept
at	I-General_Concept
rest	I-General_Concept
.	O
</s>
<s>
The	O
IBM	B-Device
XIV	I-Device
management	O
GUI	O
is	O
a	O
software	B-Architecture
package	I-Architecture
that	O
can	O
be	O
installed	O
on	O
operating	O
systems	O
including	O
Microsoft	B-Application
Windows	I-Application
,	O
Linux	B-Operating_System
and	O
Mac	O
OS	O
.	O
</s>
<s>
An	O
XIV	O
Mobile	O
Dashboard	O
available	O
for	O
Android	B-Application
or	O
iOS	B-Application
.	O
</s>
<s>
The	O
IBM	B-Device
XIV	I-Device
Storage	I-Device
System	I-Device
was	O
developed	O
in	O
2002	O
by	O
an	O
Israeli	O
start-up	O
company	O
funded	O
and	O
headed	O
by	O
engineer	O
and	O
businessman	O
Moshe	O
Yanai	O
.	O
</s>
<s>
In	O
December	O
2007	O
,	O
the	O
IBM	O
Corporation	O
acquired	O
XIV	O
,	O
renaming	O
the	O
product	O
the	O
IBM	B-Device
XIV	I-Device
Storage	I-Device
System	I-Device
.	O
</s>
<s>
In	O
September	O
2011	O
,	O
IBM	O
announced	O
larger	O
disk	O
drives	O
,	O
changing	O
the	O
inter-connectivity	O
layer	O
to	O
use	O
InfiniBand	B-Architecture
rather	O
than	O
Ethernet	O
.	O
</s>
