There's no SCSI device support currently (outside of what's needed for USB and SATA), as it wouldn't make much sense: very few use those, so they should not bloat the base; but as an extension, they would need to be remastered in for the tce/other directories to be able to be on the SCSI drive.
To get support for your device, enable the needed module in the kernel configuration, "make modules", remaster the module in (or make an extension and put in /opt/tce). Just say if these instructions are too terse.