8.7 Continuous Operation During Replacement
Depending on how the subsystem is set up, if a disk unit fails, it can normally be replaced without interrupting the use of the system.
8.8 Replacing a Module
Warning Whenever replacing a module NEVER leave an EMPTY bay in the rear of the enclosure, obtain a replacement before removing the problem part.
Please refer to Chapter 6, ”Drive Enclosure Installation” for information on the initial installation of the
Warning Observe all conventional ESD precautions when handling drive enclosure modules and components. Avoid contact with Backplane components and module connectors, etc.
8.8.1Power Cooling Modules
Warning | Do not remove covers from the Power Cooling module (PCM). There is a danger of electric shock. |
| Return the PCM to your supplier for repair. |
Warning | To ensure your system has warning of a power failure please disconnect the power from the |
| power supply, by either the switch (where present) or by physically removing the power source, |
| prior to removing the PCM from the enclosure/shelf. Do not remove the faulty PCM unless you |
| have a replacement unit of the correct type ready for insertion. The system must not be run |
| without all units in place. |
| If a power supply unit or its fan is faulty, you must replace the whole PCM. You must not take any longer |
| than 5 minutes to replace this unit to prevent the enclosure from |
| As there should always be two (2) PCMs installed, you can continue working while replacing the faulty |
| module. |
| To remove an AC PCM/Cooling Module- Handle Model: |
Warning | Do not remove the faulty PCM/Cooling module unless you have a replacement unit of the correct |
| type ready for insertion. |
| If a power supply unit or its fan is faulty, you must replace the whole PCM/Cooling module. |
| As there should always be two PCMs installed, you can continue working while replacing the faulty |
| module. |
1Make sure you identify the faulty PCM correctly from the two modules installed.
2Lift latch which secures the power supply cord.
3Switch off and disconnect the power supply cord.
4Lift the PCM handle to the open position to cam the PCM out of the enclosure.
5Grip the handle and withdraw the PCM.
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