Removing a secondary expander module: 2145-92F

You can remove a secondary expander module from a 2145-92F expansion enclosure if it is faulty or 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:

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 remove a secondary expander module without powering off the expansion enclosure. However, to maintain operating temperature, perform the following tasks.

• Do not remove a faulty secondary expander module until its replacement is ready to be installed.
• 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 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.

The two secondary expansion modules are already installed when the 2145-92F expansion enclosure is shipped, as Figure 1 shows.

Figure 1. Location of secondary expander modules

Figure 2 shows the location of the LED indicators on the top of the secondary expander module. Each secondary expander module has its own set of LEDs. When power is connected to the expansion enclosure, the LEDs identify the operational status of the secondary expander modules.

Figure 2. Location of LEDs on the secondary expander module

Table 1 describes the function and status values of each LED indicator.

Table 1. LEDs on the secondary expander modules

LED	Color	Status	Description
Power  1	Green	On	The secondary expander module is receiving power.
		Off	The secondary expander module is not receiving power.
Fault  2	Amber	On	Not used.
		Blink	The secondary expander module is being identified.
		Off	Normal operation.

This task assumes that the following conditions were met:

• The expansion enclosure is slid out from the rack, as described in Removing an expansion enclosure from a rack: 2145-92F.
• The top cover was removed, as described in Removing the top cover: 2145-92F.

1. Identify the secondary expander module to be replaced; refer to Table 1.
2. Press the release buttons on top of the secondary expander module to release the handles.
3. Rotate the handles outward to the unlocked position.
4. Carefully lift the secondary expander module out of the enclosure, as shown in Figure 3.
   Figure 3. Remove the secondary expander module

   
   Important: To avoid electric shock after you remove the secondary expander module, do not touch the connectors, which are shown in Figure 4.

   Figure 4. Secondary expander module connectors

   
5. Place the secondary expander module in a safe location, as shown in Figure 5.
   Figure 5. Secondary expander module removed from the enclosure

   
6. If needed, repeat step 2 through step 5 to remove the other secondary expander module.

Replace the secondary expansion module

7. To reinstall the secondary expansion module, or replace it with one from FRU stock, follow the procedure in Installing or replacing a secondary expander module: 2145-92F.