I have an early Mac Plus 4Mb. The machine turns on and bootsbto the OS6.0.3 System floppy. I have an Apple 330Mb SCSI External Hard Drive with OS7.0 loaded on it. When I connect it to the Plus and restart it does not boot to it. However, when I turn on the Mac Plus, insert the OS6.0.3 System Floppy and turn on the 330Mb External HDD, it boots to the floppy and the 330Mb HDD shows up on the desktop. How can I make it boot directly to the 330Mb HDD? I have it set at SCSI: 6.