NetApp FAS25 Series Manual

Replacing an RTC battery
You replace the real-time clock (RTC) battery in the controller module to ensure that your system's services and applications
that depend on accurate time synchronization continue to function.
About this task
• You can use this procedure with all versions of Data ONTAP supported by your system.
• All other components in the system must be functioning properly; if not, you must contact technical support.
Steps
1. Shutting down the target controller
2. Opening the system
3. Removing an RTC battery
4. Installing an RTC battery
5. Reinstalling the controller module and booting the system
6. Running diagnostics on the RTC battery
7. Resetting the date and time on the system
8. Completing the replacement process
Shutting down the target controller
You shut down or take over the target controller using different procedures, depending on whether it is part of an HA pair or a
stand-alone system.
Shutting down a controller module in an HA pair
To shut down a controller module, you must determine the status of the impaired node and, if necessary, take over the impaired
node so that the healthy partner continues to serve data from the impaired node's storage.
About this task
As part of this procedure, you either leave the power supplies on or turn them off, depending on your configuration:
• If you have two controller modules in the same chassis, you must leave the power supplies turned on to provide power to the
healthy node.
• If you have one controller module in the chassis, you should turn off the power supplies in the chassis.
Steps
1. If running clustered Data ONTAP, check the status of the nodes in the cluster:
a. Enter the following command at the system console of either node:
cluster show
The command produces output similar to the following:
Node Health
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215-07866_A0
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Eligibility
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May 2014 Copyright
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FAS25xx System
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