NetApp
HA Configuration : Managing HA configuration : Halting a storage system
Halting a storage system
You can halt one of the storage systems in an HA configuration without a takeover by the partner system. You may halt a storage system when you have to perform maintenance on both the storage system and its disks and want to avoid an attempt by the partner node to write to those disks.
Steps 
1.
From the Home tab, double-click the appropriate HA configuration.
2.
Click HA Configuration.
3.
From the Halt system menu, select the appropriate partner storage system.
4.
Select the confirmation check box and click Halt.
5.
Verify that the storage system is halted in the HA Configuration window.
Related reference 
HA Configuration window

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