Below are the steps to monitor the performance per RDM andHBA level.

 

1. Monitor storage performance per HBA:

1.    Start esxtop by typing esxtop at the command line.

2.    Press d to switch to disk view (HBA mode).

3.    To view the entire Device name, press SHIFT + L and enter 36 in Change the name field size.

4.    Press f to modify the fields that aredisplayed.

5.    Press b, c, d, e, h, and j to toggle the fields and press Enter.

6.    Press s andthen 2 to alter the update time to every 2 seconds and press Enter.

Availble ststs to display:

 

Note: If you want to check the port utilization and wecan check from the physical switches.

 

2. Monitor storageperformance on a per-LUN basis (RDM):

1.    Start esxtop by typing esxtop from the command line.

2.    Press u to switch to disk view (LUN mode).

3.    Press f to modify the fields that aredisplayed.

4.    Press b, c, f, and h to toggle the fields and press Enter.

5.    Press s and then 2 to alter the update time to every 2 seconds and press Enter.

Availble stats to display: