Method used to modify the LUN prefetch policy

Go to the Modify LUN dialog box.
In the ISM navigation tree, choose All Devices > SN_XX > Storage Resources > LUN (SN_XX is the name of the target storage system).
In the right function pane, select the LUN you want to modify.
Click Modify.
The Modify LUN dialog box is displayed.
Modify the basic and advanced attributes of the LUN.

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