NetApp
Nodes : Configuration > Flash Cache : Managing Flash Cache : Enabling or disabling Flash Cache
Enabling or disabling Flash Cache
You can enable or disable the WAFL external cache functionality for a storage system that has a PAM II card or Flash Cache module installed. You can enable Flash Cache based on the workload requirements of your storage system.
Steps 
1.
From the home page, double-click the appropriate storage system.
2.
Expand the Nodes hierarchy in the left navigation pane.
3.
In the navigation pane, click Configuration > Flash Cache.
4.
Click Enable or Disable, as required.

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