Product guide

70 EMC Ionix ControlCenter 6.1: Taking Control of Your Datacenter
Reporting on Your Datacenter
Figure 45 Graph of Symmetrix disks
Analyzing a storage array device
The UNIX administrator now analyzes array device 0x011 for the performance
problems.
To complete this task, the UNIX administrator:
1. In the middle Metrics pane, selects device 0x011.
2. In the bottom Metrics pane, selects %hit to view the percentage of hits from the
array device to the array cache (cache hit ratio).
3. Clicks the Graph Per Metric () button.
A graph appears showing that the cache hit ratio fell considerably at 9 A.M. and 6
P. M . Figure 46.