NetApp
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.
Before you begin 
If the storage system is running Data ONTAP 7.3.x, 8.0.4, or 8.0.5, you must have installed the Flash Cache license.
Steps 
1.
From the home page, double-click the appropriate storage system.
2.
In the navigation pane, click Configuration > Flash Cache.
3.
Click Enable or Disable, as required.

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