Installing or replacing a secondary expander module: 2145-92F

You can replace a faulty secondary expander module in a 2145-92F expansion enclosure. You can also reinstall the secondary expander modules after you perform other service tasks.

Before you begin

DANGER

Hazardous voltage present. Voltages present constitute a shock hazard, which can cause severe injury or death. (L004)

DANGER

Hazardous energy present. Voltages with hazardous energy might cause heating when shorted with metal, which might result in splattered metal, burns, or both. (L005)

CAUTION:

Use caution when you are removing or replacing a secondary expander module from an enclosure (01LJ112) that is powered on. Avoid contact with the connectors on the main board. Only an IBM Service Support Representative (SSR) can remove the secondary expander module if the 01LJ112 enclosure is powered.

Important: You can replace a secondary expander module without powering off the expansion enclosure. However, to maintain operating temperature, do not keep the cover off an operational enclosure for more than 15 minutes. The reduction in airflow through the enclosure might cause the enclosure or its components to shut down to protect from overheating.

About this task

The 2145-92F expansion enclosure contains two secondary expander modules, as Figure 1 shows. The secondary expander modules provide SAS connectivity between the expansion canisters and the drives. Each drive has 2 SAS ports. SAS port 1 of each drive is connected to secondary expander module 1. SAS port 2 of each drive is connected to secondary expander module 2. Each expansion canister is connected to both secondary expander module 1 and secondary expander module 2. If secondary expander module 2 is missing or is faulty, the expansion canisters can communicate only with SAS port 1 on each drive. Similarly, if secondary expander module 1 is missing or is faulty, the expansion canisters can communicate only with SAS port 2 on each drive.

Figure 1. Location of secondary expander modules

This task assumes that the following conditions were met:

• The top cover was removed, as described in Removing the top cover: 2145-92F.
• The secondary expansion module was removed, as described in Removing a secondary expander module: 2145-92F.

1. Slide the expansion enclosure out from the rack, as described in Removing an expansion enclosure from a rack: 2145-92F.
2. Identify the secondary expander module to be replaced; Figure 2 shows the LEDs on top of a secondary expansion module.
   Figure 2. LEDs on a secondary expansion module

   
   •  1  Online indicator
   •  2  Fault indicator
3. Rotate both handles on the new secondary expander module to an open position, as shown in Figure 3.
   Figure 3. Open the secondary expander module handles

   
4. Carefully align the edges of the secondary expander module in the guide slot in the enclosure, as shown in Figure 4.
   Figure 4. Replace the secondary expander module

   
5. Press the secondary expander module down into position in the enclosure.
6. Rotate the handles on the secondary expander module to the closed position to lock it in the enclosure.
7. If needed, repeat step 3 through step 6 to replace the other secondary expander module.
8. Replace the top cover, as described in Installing or replacing the top cover: 2145-92F.
9. If needed, reconnect the power cables to the expansion enclosure, as described in Powering on the expansion enclosure: 2145-92F.
10. Check the LEDs on the top of the secondary expander module to verify that it is receiving power.

    SAN Volume Controller 2145-92F expansion enclosure LEDs and indicators describes the status indicated by the LEDs.