Dell Compellent Series 30 - Manual (Page 119)

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Topology Explorer Volume Functions
The Folders button toggles between showing and hiding folder. When the Folders button
is toggled to show folders, a red line is drawn through the Folders button and unmapped
folders are displayed.
Figure 87. Topology View with Folders
Notice that when the Topology Explorer displays folders, two additional command objects
appear at the bottom of the screen: Create New Server Folder and Create New Volume
Folder.