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Table Of Contents
4 Select the type of sharing in the SCSI Bus Sharing list.
Option Description
None
Virtual disks cannot be shared by other virtual machines.
Virtual
Virtual disks can be shared by virtual machines on the same server.
Physical
Virtual disks can be shared by virtual machines on any server.
5 Click Save.
Change the SCSI Controller Type in the VMware Host Client
You can aach virtual disks and RDMs to virtual machines by conguring virtual SCSI controller on the
virtual machines.
The choice of SCSI controller does not aect whether your virtual disk is an IDE or SCSI disk. The IDE
adapter is always ATAPI. The default for your guest operating system is already selected. Older guest
operating systems have BusLogic adapter as their default controller.
If you create an LSI Logic virtual machine and add a virtual disk that uses BusLogic adapters, the virtual
machine boots from the BusLogic adapters disk. LSI Logic SAS is available only for virtual machines with
hardware version 7 or later. Disks with snapshots might not experience performance gains when used on
LSI Logic SAS, VMware Paravirtual, and LSI Logic Parallel adapters.
C Changing the SCSI controller type might result in a virtual machine boot failure.
Prerequisites
Power o the virtual machine.
Procedure
1 Click Virtual Machines in the VMware Host Client inventory.
2 Right-click a virtual machine in the list and select Edit  from the pop-up menu.
3 Click the Virtual Hardware tab and expand a SCSI controller.
4 Select a SCSI controller type from the drop-down menu.
5 Click Save.
About VMware Paravirtual SCSI Controllers
VMware Paravirtual SCSI controllers are high performance storage controllers that can result in greater
throughput and lower CPU use. These controllers are best suited for high performance storage
environments.
VMware Paravirtual SCSI controllers are available for virtual machines with ESXi 4.x and later compatibility.
Disks on such controllers might not experience optimal performance gains if they have snapshots or if
memory on the ESXi host is over commied. This behavior does not mitigate the overall performance gain
of using VMware Paravirtual SCSI controllers as compared to other SCSI controller options.
If you have virtual machines with VMware Paravirtual SCSI controllers, those virtual machines cannot be
part of an MSCS cluster.
For platform support for VMware Paravirtual SCSI controllers, see the VMware Compatibility Guide at
hp://www.vmware.com/resources/compatibility.
Chapter 3 Virtual Machine Management with the VMware Host Client
VMware, Inc. 65