12. Replace the cover, as described in âInstalling or replacing the top cover: 2076-92F â on page 62.
13. Slide the expansion enclosure back into the rack, as described in âInstalling or replacing an
expansion enclosure in a rack: 2076-92F â on page 50.
Installing or replacing a secondary expander module: 2076-92F
You can replace a faulty secondary expander module in a 2076-92F 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.
About this task
The 2076-92F expansion enclosure contains two secondary expander modules, as Figure 75 on page 68
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.
Chapter 2. Installing the system hardware
67
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