Installing or replacing a secondary expander module

You can replace a faulty secondary expander module in a 5U expansion enclosure. You may also need to install a secondary expander module that was temporarily removed to 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:

• Only an IBM Service Support Representative (SSR) can remove or replace the secondary expander module from an enclosure (FRU P/N 01LJ112) that is powered on. If the 01LJ112 enclosure is powered on, use caution and avoid contact with the connectors on the main board.
• If the FRU part number of the enclosure is 01LJ607, you can remove or replace the secondary expander module while the enclosure is powered on.

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.
• Ensure that the FRU P/N for the replacement secondary expander module is appropriate for the enclosure in which it is being installed. For more information, see Replaceable units: 5U expansion enclosure.

About this task

As Figure 1 shows, the 5U expansion enclosure contains two secondary expander modules. In the figure,  A  shows the location of secondary expander module 1,  B  shows secondary expander module 2, and  C  shows the front of the enclosure.

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 expansion canister 1 through secondary expander module 2. SAS port 2 of each drive is connected to expansion canister 2 through secondary expander module 1. If secondary expander module 2 is missing or is faulty, the expansion canister can communicate only with SAS port 2 on each drive. Similarly, if secondary expander module 1 is missing or is faulty, the expansion canister can communicate only with SAS port 1 on each drive.

This task assumes that the following conditions were met:

• The top cover was removed, as described in Removing the top cover.
• The secondary expander module was removed, as described in Removing a secondary expander module.

1. Slide the expansion enclosure out from the rack, as described in Removing a 5U expansion enclosure from a rack.
2. Identify the secondary expander module to be replaced; Figure 2 shows the LEDs on top of a secondary expander 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.

   

4. Align the edges of the secondary expander module carefully in the guide slot in the enclosure, as shown in Figure 4.

   

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.
9. If needed, reconnect the power cables to the expansion enclosure, as described in Powering on the 5U expansion enclosure.
10. Check the LEDs on the top of the secondary expander module to verify that it is receiving power.

    5U expansion enclosure LEDs and indicators describes the status indicated by the LEDs.