2
Hardware Description
28
DIMM memory
This
memory
is
directly
addressed
by
the
internal
memory
controller
of
each
E5
‐
2400
family
processor.
Due
to
the
board
height
limitations
posed
by
the
ATCA
PICMG
specifications,
only
Very
Low
Profile
(VLP)
Dual
In
‐
line
Memory
Module
(DIMM)
modules
are
supported
with
the
CPM.
The
Registered
DIMM
(RDIMM)
memory
used
on
the
CPM
is
buffered
by
integral
registers
and
has
built
‐
in
Error
Correcting
Code
(ECC)
bits
to
support
more
reliable
operation.
As
part
of
the
installation
process
for
the
CPM,
up
to
twelve
RDIMM
modules
(six
per
processor,
from
1GB
to
16GB
each)
must
be
installed
in
the
CPM
DIMM
sockets.
Refer
to
Adding
or
replacing
memory
modules
on
page 73
for
the
installation
procedures.
Non-volatile on-board memory
The
CPM
non
‐
volatile
memory
is
mainly
comprised
of
the
following
elements:
•
The
two
64
‐
Mbit
Flash
BIOS
boot
and
redundant
boot
devices.
•
The
64
‐
Mbit
ME
Flash
holding
the
redundant
ME
firmware.
•
IPMI
non
‐
volatile
memory
stores
IPMC
private
data
and
board
FRU
information.
•
The
optional
eUSB
NAND
Flash
memory
modules
are
available
for
user
applications
and
data.
External memory options
The
following
external
memory
options
are
available
for
the
CPM:
•
Embedded
NAND
Flash
modules.
One
or
two
eUSB
NAND
Flash
modules.
•
1.8”
micro
Solid
State
Disk
(SSD)
drives.
One
or
two
μ
SATA
SSD
modules.
This
option
requires
the
Radisys
Dual
SSD
(DSSD)
MXM
module
for
mounting
the
SSD
modules.
•
RTM
‐
installed
hard
disk
drives
(HDDs).
Number
and
capacity
dependent
on
the
RTM.
