The memory modules are electrostatic-discharge (ESD) sensitive. Take precautions to avoid
damage from static electricity when you replace the memory modules in a SAN Volume Controller 2145-SV1 node. You can
also use this procedure to add more memory to your node.
Before you begin
Review Figure 1 to identify the locations of the
dual inline memory module (DIMM) connectors on the main board. If the DIMMs are not correctly
configured into the slots, the node does not boot. Figure 1. Locating DIMM connectors
Table 1 summarizes where to populate the 16
DIMM slots to add the memory RDIMM. Ensure that the DIMMs are evenly installed across the memory
channels and CPUs.
Table 1. DIMM slots populated with the memory RDIMM
Memory
Populated DIMM slots
64 GB
A0, C0 (the outer blue slots for each processor)
128 GB
A0, C0, B0, D0 (all of the blue slots)
192 GB
A0, C0, B0, D0, A1, C1
256
GB
A0, C0, B0, D0, A1 C1, B1, D1
Important: If you are adding memory to increase total memory in the node, you
must remove the node from the system configuration before you start the following procedure. To do
so, you can use the management GUI or the CLI.
To use the management GUI, right-click the node and select Remove.
To use the CLI, enter the following command, where node_id | node_name
identifies the node that receives the additional
memory:
svctask rmnode node_id | node_name
If you are replacing a faulty DIMM with a new identical one from FRU stock, you do not need
to remove the node from the system configuration.
Open the retaining clip on each end of the DIMM connector.
Attention: To avoid breaking the retaining clips or damaging the DIMM connectors, open
and close the clips gently.
Touch the static-protective package that contains the DIMM to any unpainted metal surface on
the file module. Remove the DIMM from the package.
Turn the DIMM so that the DIMM keys align correctly with the connector.
Insert the DIMM into the connector by aligning the edges of the DIMM with the slots at the ends
of the DIMM connector, as shown in Figure 2.
Firmly press the DIMM straight down into the connector by applying pressure on both ends of
the DIMM simultaneously. The retaining clips snap into the locked position when the DIMM is firmly
seated in the connector. Figure 2. Installing the DIMM
Attention: If a gap exists between the DIMM and the retaining clips, the DIMM is
not correctly inserted; open the retaining clips, remove the DIMM, and then reinsert it.
Repeat steps 3 through 6 until all the new or replacement DIMMs are
installed.
If you powered off a node to add memory to increase total memory, do not power on the node if it
shows as offline in the management GUI. Before you increase memory, you must remove a node from the
system so that it is not showing in the management GUI or in the output from the
lsnode command. Do not power on a node that is still in the system and showing as
offline with more memory than the node had when it powered off. Such a node can cause an immediate
outage or an outage when you update the system software.
When the node is active again, go to the management GUI and look for any unfixed events that
are related to the DIMMs.
Attention: If a gap exists between the DIMM and the retaining clips, the DIMM is not correctly inserted; open the retaining clips, remove the DIMM, and then reinsert it.