The SCSI.device of the FastATA does not see partitions made with OS3.9 if it is using its own updated SCSI.device. The FastATA command can be left out of the Startup-Sequence and it should work with about the same speed of 9 to 10 MB/s. Or you can do all the setup and installs using the command, but I had major issues mixing the two on a 40 GB drive and the most recent FastATA ROM and software.