3. Ensuring that the IOM is level, slide it into the enclosure as far as it will go.
An IOM that is only partially seated will prevent optimal performance of the expansion enclosure. Verify that the IOM is fully seated
before continuing.
4. Secure the IOM in position by manually closing the latch.
You should hear a click as the latch handle engages and secures the IOM to its connector on the back of the midplane.
5. Reconnect the cables.
Replacing a power supply unit (PSU)
Illustrations in the power supply unit module replacement procedures show rear panel views of the enclosure, and PSUs are properly
aligned for insertion into the PSU slots.
Before you begin any procedure, see ESD precautions.
Removing a PSU
Before removing the PSU, disconnect the power from the PSU by either the mains switch (where present) or by physically removing the
power source in order to ensure your system has warning of imminent power shutdown. Make sure that you correctly identify the faulty
PSU before beginning the step procedure.
CAUTION: Removing a power supply unit significantly disrupts the enclosure’s airflow. Do not remove the PSU until you
have received the replacement module. It is important that all slots are filled when the enclosure is in operation.
1. Stop all I/O from hosts to the enclosure. See Shutting down a controller module.
NOTE:
This step is not required for hot-swapping. However, it is required when replacing both PSUs at once.
2. Use management software to shut down any other system components necessary.
NOTE:
This step is not required for hot-swapping. However, it is required when replacing both PSUs at once.
3. Verify the Power OK LED is lit, then switch off the faulty PSU, and disconnect the power supply cable.
4. If replacing a single PSU via hot-swap, proceed to step 6.
5. If replacing both PSUs, verify that the enclosure was shut down using management interfaces, and that the enclosure is powered off.
6. Verify that the power cable is disconnected.
7. Push the release latch to the right and hold it in place (detail No.1).
8. With your other hand, grasp the handle and pull the PSU outward (detail No.2).
Figure 56. Removing a PSU (1 of 2)
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Module removal and replacement
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