SDK for Adding SCSI controller

Hello,

I am trying to add a SCSI controller using MOB/SDK. The VM reconfigure is happening, but SCSI Controllers are not added. Following is the payload I am using.

<device-change>
<operation>add</operation>
<device type="VirtualBusLogicController">
<bus-number>0</bus-number>
<device>-1</device>
<shared-bus>noSharing</shared-bus>
</device>
</device-change>

Also, I would need to add specifc controllers(Like SCSI controller 1, 2 etc). Can someone help?