The VxCLUS utility provides a means to remove the limitation that a Cluster dynamic disk group cannot be created on the same bus as the Microsoft Windows System or Boot disk. It also allows disk groups to be imported on a cluster without a majority of disks. The SANBOOT switch of vxclus.exe has been renamed to UseSystemBus, and the option will work for both SCSI and fibre devices. The following syntax usage is common to Volume Manager and Storage Foundation:

SFW 4.1 and above includes the switch -p switch. If -p is specified, the entry made in the Windows registry is such that the vxclus force import functionality remains enabled. This allows persistent force imports of a cluster disk group so that this resource can always be brought online with in the cluster. The -p switch is applicable to SFW in an MSCS environment only.

The vxclus utility is applicable to SFW-HA to allow the creation of a Cluster dynamic disk group on the same bus as the Microsoft Windows System or Boot disk.  To create a cluster disk group on the same bus as the disk that contains the cluster node's system or boot disk execute the following command in a Windows command prompt:
For Volume Manager 3.1:
vxclus enable sanboot.

For SFW 4.1 and above:
vxclus UseSystemBus ON.

To reverse the vxclus UseSystemBus ON command and remove the Registry changes that make it possible to create a Cluster dynamic disk group that can reside on the same bus as the cluster node's system or boot disk, use the command, execute the following command in a Windows command prompt:
vxclus UseSystemBus OFF