Product guide

Identifying a storage array performance problem 73
Reporting on Your Datacenter
Figure 48 Graph of destaged data on the Symmetrix array
The UNIX administrator is now certain that the data destaging on the Symmetrix
array is what caused the performance to degrade.
Identifying hosts connected to a storage array
Now the UNIX administrator needs to determine what caused the Symmetrix array to
destage data, and checks to see if another host connected to the Symmetrix array was
perhaps accessing the array at the same time as host l82ar156.
To complete this task, the UNIX administrator:
1. In the top Metrics pane, under the Symmetrix folder, selects the Devices folder.
All devices on the Symmetrix array that were active appear in the middle Metrics
pane.