Replacing memory modules: 2145-DH8

The memory modules are electrostatic-discharge (ESD) sensitive. Take precautions to avoid damage from static electricity when you replace the SAN Volume Controller 2145-DH8 memory modules. You can also use this procedure to add more memory to your node.

About this task

See Figure 1 for the locations of the DIMM connectors on the system board.
Figure 1. Locating DIMM connectors on the system board
Locations of the DIMM connectors on the system board
Table 1 lists the eight DIMM slots that are populated with the memory RDIMM.
Table 1. DIMM slots populated with the memory RDIMM
Processor DIMM Slot Number
1 1 - 8 GB RDIMM
4 - 8 GB RDIMM
9 - 8 GB RDIMM
12 - 8 GB RDIMM
2 (if fitted) 13 - 8 GB RDIMM
16 - 8 GB RDIMM
21 - 8 GB RDIMM
24 - 8 GB RDIMM
Note: Do not put any DIMM into DIMM slots 2, 3, 5, 6, 7, 8, 10, 11, or slots 13 - 24 if processor 2 is not fitted.
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.

Procedure

  1. Remove the air baffle over the DIMMs.
  2. 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.
  3. Touch the static-protective package that contains the DIMM to any unpainted metal surface on the file module, and then remove the DIMM from the package.
  4. Turn the DIMM so that the DIMM keys align correctly with the connector.
  5. 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
    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.
  6. Repeat steps 1 through 5 until all the new or replacement DIMMs are installed.
  7. Replace the air baffle over the DIMMs, making sure that all cables are out of the way.
  8. Install the cover.
  9. Slide the file module into the rack.
    CAUTION:

    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.

  10. Go to the management GUI and look for any unfixed events that are related to the DIMMs.