When you enable Storage I/O Control, ESXi monitors datastore latency and throttles the I/O load if the datastore average latency exceeds the threshold.


  1. Browse to the datastore in the vSphere Web Client navigator.
  2. Click the Configure tab.
  3. Click Settings and click General.
  4. Click Edit for Datastore Capabilities.
  5. Select the Enable Storage I/O Control check box.
  6. Click OK.


Under Datastore Capabilities, Storage I/O Control is enabled for the datastore.