/dev/dsk/c2d0s6 (controller 2, slave 0, slice 6 (4.x partition "g"))
or an sd device, such as:
/dev/dsk/c0t3d0s0 (controller 0, target 3, lun 0, slice 0 (4.x partition "a"))
The logical name conveys nothing about the type of controller. It does not differentiate between SCSI and IPI; they are both just disks.