Power Supplies; Overview And Requirements; Requirements For Replacing A Power Supply; Replace A Power Supply - Fujitsu ETERNUS AB Series Hardware Maintenance Manual

Power Supplies

A power supply provides a redundant power source in a controller shelf.

Overview and requirements

Before you replace a power supply, you need to be aware of some requirements.

Requirements for replacing a power supply

If you plan to replace a power supply, keep the following requirements in mind.
• You must have a replacement power supply that is supported for your controller shelf or drive shelf model.
• You have an ESD wristband, or you have taken other antistatic precautions.
This section describes how to replace a power supply in the following shelves:
• AB6100 controller shelf

Replace a power supply

You can replace the power supply when they fail in your AB6100 controller. If a power supply fails, you must
replace it as soon as possible so the controller shelf has a redundant power source.

Place controller offline

You must place the controller shelf offline so you can safely replace your failed power supply. You must back
up the configuration and collect support data first. Then, you can take the controller shelf offline.
Before you begin
• You have reviewed the details in the Recovery Guru to confirm that there is an issue with the power supply.
Select Recheck from the Recovery Guru to ensure no other items must be addressed first.
• You have checked that the amber Attention LED on the power supply is on, indicating that the power
supply or its integrated fan has a fault.
Procedure
1. From the Home of SANtricity System Manager, ensure that the storage array has Optimal status.
If the status is not Optimal, use the Recovery Guru or contact technical support to resolve the problem. Do
not continue with this procedure.
2. Back up the storage array's configuration database.
If a problem occurs when you remove a controller, you can use the saved file to restore your configuration.
a) In System Manager, navigate to the support page.
b) Select the Support Center tab.
c) Select the Diagnostics tab.
d) Select Collect Support Data.
3. Ensure that no I/O operations are occurring between the storage array and all connected hosts. For
example, you can perform these steps:
• Stop all processes that involve the LUNs mapped from the storage to the hosts.
• Ensure that no applications are writing data to any LUNs mapped from the storage to the hosts.
• Unmount all file systems associated with volumes on the array.
Note: The exact steps to stop host I/O operations depend on the host operating system and the
configuration, which are beyond the scope of these instructions. If you are not sure how to stop host I/O
operations in your environment, consider shutting down the host.
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