<s>
The	O
ULLtraDIMM	B-Device
is	O
a	O
solid	B-Device
state	I-Device
storage	I-Device
device	O
from	O
SanDisk	O
that	O
connects	O
flash	B-Device
storage	I-Device
directly	O
onto	O
the	O
DDR3	O
memory	O
bus	O
.	O
</s>
<s>
Unlike	O
traditional	O
PCIe	O
Flash	B-Device
Storage	I-Device
devices	O
,	O
the	O
ULLtraDIMM	B-Device
is	O
plugged	O
directly	O
into	O
an	O
industry	O
standard	O
RDIMM	B-General_Concept
memory	O
bus	O
slot	O
in	O
a	O
server	B-Application
.	O
</s>
<s>
The	O
ULLtraDIMM	B-Device
is	O
compatible	O
with	O
the	O
JEDEC	O
MO-269	O
DDR3	O
RDIMM	B-General_Concept
specification	O
.	O
</s>
<s>
The	O
ULLtraDIMM	B-Device
supports	O
support	O
both	O
1.35V	O
and	O
1.5V	O
operation	O
from	O
800	O
–	O
1333MHz	O
,	O
and	O
1.5V	O
@	O
1600MHz	O
DDR3	O
transfer	O
rates	O
.	O
</s>
<s>
DDR3	O
ECC	B-General_Concept
bits	O
are	O
used	O
to	O
verify	O
the	O
integrity	O
of	O
the	O
data	O
being	O
sent	O
across	O
memory	O
bus	O
.	O
</s>
<s>
The	O
ULLtraDIMM	B-Device
will	O
verify	O
that	O
correct	O
ECC	B-General_Concept
is	O
received	O
and	O
,	O
if	O
there	O
are	O
errors	O
,	O
the	O
device	O
driver	O
will	O
re-run	O
the	O
transfer	O
.	O
</s>
<s>
The	O
CPU	O
treats	O
the	O
ECC	B-General_Concept
from	O
the	O
ULLtraDIMM	B-Device
in	O
the	O
same	O
manner	O
as	O
ECC	B-General_Concept
from	O
a	O
memory	O
DIMM	B-General_Concept
,	O
single	O
symbol	O
errors	O
are	O
corrected	O
.	O
</s>
<s>
The	O
DDR3	O
ECC	B-General_Concept
bits	O
are	O
not	O
stored	O
in	O
the	O
flash	O
array	O
.	O
</s>
<s>
A	O
separate	O
ECC	B-General_Concept
scheme	O
is	O
used	O
for	O
protecting	O
data	O
in	O
the	O
flash	O
array	O
.	O
</s>
<s>
Memory	O
interleaving	O
of	O
standard	O
RAM	B-Architecture
is	O
not	O
affected	O
by	O
the	O
presence	O
of	O
ULLtraDIMMs	B-Device
.	O
</s>
<s>
UEFI/BIOS	O
updates	O
are	O
required	O
to	O
properly	O
recognize	O
an	O
ULLtraDIMM	B-Device
in	O
the	O
system	O
as	O
a	O
block	O
device	O
and	O
not	O
halt	O
the	O
bootstrap	B-Operating_System
sequence	I-Operating_System
.	O
</s>
