You can view storage reports in the vSphere Web Client Monitor tab. Storage reports provide an in-depth look at your storage resources.
For the object you select in the inventory, a list of categories associated with the object is available. You can display and review statistics for each category of items on the list depending on the inventory object.
For example, if the inventory object is a datastore, you can display information for all virtual machines that reside on the datastore, all hosts that have access to the datastore, a LUN or LUNs, on which the datastore is deployed, and so on. In addition, if your storage supports vendor providers developed through the Storage APIs - Storage Awareness, you can also see information about physical arrays. For information on vendor providers, see the vSphere Storage documentation.
When you display the reports tables, the default column headings depend on the inventory object you select. You can customize the tables by adding or removing columns. Reports are automatically updated every 120 minutes. You can manually update the reports by clicking Rescan in the vSphere Web Client.
You can search for specific information by filtering reports tables based on storage attributes and keywords.