Dell PowerVault ME4 Series Storage System Administrator’s Guide

Storage information

The Storage A and Storage B blocks provide more detailed information about the logical storage of the system. The Storage A block shows information about virtual pool A, which is owned by controller A. For linear storage, it shows most of the same information for all of the linear pools owned by controller A. The Storage B block shows the same types of information about virtual pool B or the linear pools owned by controller B. In a single-controller system, only the storage block relevant to that controller will be shown (for example, only the Storage A block will be shown if controller A is the sole operating controller).

Each storage block contains color-coded graphs for virtual and linear storage.

For virtual storage, the block contains a pool capacity graph, a disk group utilization graph, and—if read cache is configured—a cache utilization graph. The pool capacity graph consists of two horizontal bars. The top bar represents the allocated and unallocated storage for the pool with the same information as the capacity top bar graph, but for the pool instead of the system. The bottom horizontal bar represents the size of the pool.

The disk group utilization graph consists of a graph with vertical measurements. The size of each disk group in the virtual pool is proportionally represented by a horizontal section of the graph. Vertical shading for each disk group section represents the relative space allocated in that disk group. A tool tip for each section shows the disk group name, size, and amount of unallocated space. The color for each disk group represents the tier to which it belongs.

The cache utilization graph also consists of a graph with vertical measurements. However, since read cache does not cache pool capacity, it is represented independently.

For linear storage, the pool capacity graph consists of a single horizontal bar that shows the overall storage for the pool(s) owned by the controller. Unlike with virtual storage, there is no bottom horizontal bar. The disk group utilization graph is similar to that shown for virtual storage. The size of each linear disk group in the storage block is proportionally represented by a horizontal section of the graph. Vertical shading for each disk group section represents the relative space allocated in that disk group. A tool tip for each section shows the disk group name, size, and amount of unallocated space. The sections are all the same color since linear disk groups are not tiered.

The number of volumes and virtual snapshots for the pool owned by the controller appears above the top horizontal bar for both virtual and linear storage.

Hover the cursor anywhere in a storage block to display the Storage Information panel. The Storage Information panel only contains information for the type of storage that you are using.