Replacing the memory modules: 2145-SV1

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 will not boot up.

Figure 1. Locations of the 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 a 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 one from FRU stock, you do not need to remove the node from the system configuration.

1. Remove PCIe riser assembly 1 and 2, as described in Removing a PCI express riser-card assembly: 2145-SV1.
2. Remove the air baffle over the DIMMs, as described in Removing the air baffle: 2145-SV1.
3. 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.
4. Touch the static-protective package that contains the DIMM to any unpainted metal surface on the file module. Remove the DIMM from the package.
5. Turn the DIMM so that the DIMM keys align correctly with the connector.
6. 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 there is a gap between the DIMM and the retaining clips, the DIMM is not correctly inserted; open the retaining clips, remove the DIMM, and then reinsert it.
7. Repeat steps 3 through 6 until all the new or replacement DIMMs are installed.
8. Replace the air baffle over the DIMMs, as described in Replacing the air baffle: 2145-SV1.
9. Replace PCIe riser assembly 1 and 2, as described Replacing a PCI express riser-card assembly: 2145-SV1.
10. Install the cover, as described in Replacing the top covers: 2145-SV1.
11. When the node is active again, go to the management GUI and look for any unfixed events that are related to the DIMMs.