v 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.
v 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 “Storwize V5000 Gen2 2077-92F expansion enclosure parts” on
page 142.
About this task
The 2077-92F expansion enclosure contains two secondary expander modules, as
Figure 64 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.
This task assumes that the following conditions were met:
v The top cover was removed, as described in “Removing the top cover: 2077-92F”
on page 48.
v The secondary expansion module was removed, as described in “Removing a
secondary expander module: 2077-92F” on page 108.
Procedure
1. Slide the expansion enclosure out from the rack, as described in “Removing
an expansion enclosure from a rack: 2077-92F” on page 95.
Figure 64. Location of secondary expander modules
78 Storwize V5000 Gen2: Quick Installation Guide
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