You can add a VMware Paravirtual SCSI high performance storage controller to provide greater throughput and lower CPU utilization.

VMware Paravirtual SCSI controllers are best suited for environments, especially SAN environments, that run I/O-intensive applications.


  • Verify that the virtual machine has a guest operating system with VMware Tools installed.
  • Verify that the virtual machine has hardware version 7 or later.
  • Familiarize yourself with VMware Paravirtual SCSI limitations. See vSphere Virtual Machine Administration.
  • To access boot disk devices attached to a VMware Paravirtual SCSI controller, verify that the virtual machine has a Windows 2003 or Windows 2008 guest operating system.
  • In some operating systems, before you change the controller type you must create a virtual machine with an LSI Logic controller and install VMware Tools.

Power off the virtual machine.


  1. Click Virtual Machines in the VMware Host Client inventory.
  2. Right-click a virtual machine in the list and select Edit settings from the pop-up menu.
  3. On the Virtual Hardware tab, click Add other device and select SCSI Controller from the drop-down menu.
    The new SCSI Controllers appear in the Hardware list.
  4. Click the New SCSI Controller and select VMware Paravirtual from the drop-down menu.
  5. Click Save.