The statistics for pools and volume groups are calculated by aggregating all volumes, including reserved capacity volumes.

When a zero is displayed for a data point in the graphs and table, it means there is no I/O activity for the object for that point in time. This situation could occur because the host is not initiating I/O to that object, or it could be a problem with the object itself.

The Latency graph provides latency statistics, in milliseconds (ms), for volumes, volume groups, pools, applications, and workloads. This graph appears in the Logical View, Physical View, and Applications & Workloads View tabs.

The IOPS graph displays statistics for input/output operations per second. On the Home page, this graph displays statistics for the storage array. In the Logical View, Physical View, and Applications & Workloads View tabs of the Performance tile, this graph displays statistics for the storage array, volumes, volume groups, pools, applications, and workloads.

The MiB/s graph displays transfer speed statistics in mebibytes per second. On the Home page, this graph displays statistics for the storage array. In the Logical View, Physical View, and Applications & Workloads View tabs of the Performance tile, this graph displays statistics for the storage array, volumes, volume groups, pools, applications, and workloads.

The CPU graph displays processing capacity statistics for each controller (controller A and controller B). CPU is an abbreviation for central processing unit. On the Home page, this graph displays statistics for the storage array. On the Physical View tab of the Performance tile, this graph displays statistics for the storage array and drives.

The Headroom graph is related to remaining performance capability for the storage array controllers. This graph is visible on the Home page and on the Physical View tab of the Performance tile.