How to know whether the front-end services are interrupted by observing them on the ISM interface?

You can view the performance statistics of the storage device on the ISM interface to determine whether the front-end services are interrupted. The procedure is as follows:

Log in to the ISM, choose Performance > Performance Monitoring from the main menu. The Performance Monitoring dialog box is displayed.
In the Object Type drop-down list box, select Front-End Host Port.
In the Statistics Object group box, select the port for performance statistics.
In the Statistics Type drop-down list box, select All statistics items.
In the Data Type group box, select Write Throughput (IOPS) or Read Throughput (IOPS).
View the real-time monitoring of device performance figure in the function pane. If the statistics suddenly stops, it indicates that the services are interrupted.

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