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, running 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.
- Ensure that you are familiar with VMware Paravirtual SCSI limitations. See About VMware Paravirtual SCSI Controllers.
- 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 need to create a virtual machine with an LSI Logic controller, install VMware Tools, then change to paravirtual mode.
- In the vSphere Client inventory, right-click the virtual machine and select Edit Settings.
- Click the Hardware tab and click Add.
- Select SCSI Device and click Next.
- Select a SCSI device in the Connection panel.
- Select an unused Virtual Device Node and click Next.
For device node SCSI (0:2), 0 is the controller number and 2 is the number of the device that is attached to the controller. If you select a node on which devices already exist (for example, SCSI 0:3) you will add a SCSI device to the existing controller. To add a new controller, you must select an unused device node on an unused SCSI controller (for example 1:0).
- Review your selections and click Finish.
New SCSI Controller (adding) and New SCSI Device (adding) appear in the Hardware list.
- Click OK to save your changes and exit the dialog box.
- Reopen the Virtual Machine Properties Editor.
- Select the new SCSI controller and click Change Type.
- Select VMware Paravirtual and click OK.
- Click OK to save your changes.