The following procedure uses SCSI controller c1 in the example of unconfiguring a SCSI controller.
# cfgadm -c unconfigure c1
Verify that the SCSI controller is unconfigured.
# cfgadm -al Ap_Id Type Receptacle Occupant Condition c0 scsi-bus connected configured unknown c0::dsk/c0t0d0 disk connected configured unknown c0::rmt/0 tape connected configured unknown c1 scsi-bus connected unconfigured unknown
Notice that the Occupant column for c1 specifies unconfigured, indicating that the SCSI bus has no configured occupants.
If the unconfigure operation fails, see How to Resolve a Failed SCSI Unconfigure Operation.