Storage metrics

Before we start exploring disk performance metrics, I will walk you through three different screens for the disk metrics. The first storage metrics screen is called disk device view, where you can view LUN information; the second one is the disk VM screen where you can see the statistics per virtual machine basis; and the last one is the disk adapter screen where you can view the information of disk statistics per host bus adapter (HBA) basis.

Let's access esxtop to view the disk statistics in the LUN mode:

1. Connect to a vSphere host using SSH and log in as root or an administrative user.
2. In the command prompt, type esxtop without any flags.
3. Press u to switch disk device screen. This screen displays detailed information about storage, including your LUN, available data stores, shares, and number of objects.
4. Press f to go into Current Field Order screen.
5. You need to enable some additional information for the Number of Objects and Shares fields. Press c and then press d to enable...