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xStack Storage Management Center Software User’s Guide 77

5.3.2 Viewing Extents on a Drive (Extents Tab)

An extent is a contiguous set of logical blocks (LBs) on a drive. An extent is also called a

physical extent.

When a drive is selected in the Main Display, you can use the Extents tab to view

information about the extents on the selected drive. Initially, the Extents tab shows basic

extent information, as shown in Figure 5-6. This read-only screen provides volume name

links below the first Description column that, when clicked, display the selected volume in

the Extents tab of the Volume View (see section 4.4.2).

Figure 5-6. Extents Tab (Basic View)

You can use one of the following methods to display advanced extent information in the

Extents tab for the selected volume:

 On the Volume Actions menu, check Show Advanced View.

 Check Show Advanced Extents in the Drive Actions panel.

 Press the right mouse button and click Show Advanced View from the shortcut menu.

Press the F9 key.

Figure 5-7 shows an example of the advanced view displayed in the Extent tab.

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