Use the vmkfstools command to list attributes of a VMFS volume.

-P --queryfs
      -h --human-readable

When you use this option on any file or directory that resides on a VMFS volume, the option lists the attributes of the specified volume. The listed attributes include the file system label, if any, the number of extents comprising the specified VMFS volume, the UUID, and a listing of the device names where each extent resides.

Note

If any device backing VMFS file system goes offline, the number of extents and available space change accordingly.

You can specify the -h suboption with the -P option. If you do so, vmkfstools lists the capacity of the volume in a more readable form, for example, 5k, 12.1M, or 2.1G.