You can add a paravirtual SCSI (PVSCSI) high performance storage adapter to provide greater throughput and lower CPU utilization.

PVSCSI adapters are best suited for environments, especially SAN environments, running I/O-intensive applications.

Windows 2003 and 2008 guest operating systems support boot disk devices attached to a PVSCSI adapter.

PVSCSI adapters do not support bootable disks on Red Hat Linux 5 virtual machines. You must configure such virtual machines with a primary SCSI adapter other than PVSCSI to support a disk where the system software is installed.

An existing virtual machine with a guest operating system and VMware Tools installed.

1

In the vSphere Client inventory, right-click the virtual machine and select Edit Settings.

2

Click the Hardware tab and click Add.

3

Select SCSI Device and click Next.

4

Select a SCSI device in the Connection panel.

5

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 adapter. To add a new adapter, you must select an unused device node (for example 1:0).

6

Review your selections and click Finish.

New SCSI Controller (adding) and New SCSI Device (adding) appear in the Hardware list.

7

Click OK to save your changes and exit the dialog box.

8

Reopen the Virtual Machine Properties Editor.

9

Select the new SCSI controller and click Change Type.

10

Select VMware Paravirtual and click OK.

11

Click OK to save your changes and close the dialog box.