Removing A Secondary Expander Module: 2145-92F - IBM SAN Volume Controller 2145-SV1 Hardware Installation Manual

9. To reinstall a drive, or replace it with one from FRU stock, follow the procedure in "Installing or
replacing a drive: 2145-92F " on page 73.

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)
CAUTION:
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 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 113 on page 106 shows.
Chapter 4. Installing an optional 5U SAS expansion enclosure 105