So here is my latest dilemma. Thanks in no small part to Phreakout's help, I was able to successfully boot my SE/30 from the internal hard drive, and access the contents of the hard drive. I initially booted from a Disk Tools floppy, ran Disk First Aid, and suddenly the hard drive appeared. After that, I've been able to boot from the hard drive each and every time.

The issue is that I can't seem to copy most files to the hard drive or create new folders on the drive. I always get a message stating that an "error of type -127 occurred." Any idea what this is and how I can fix it?

On a related note, I'm somewhat concerned about the integrity of the 600 MB hard disk installed in this machine, and would love to find a suitable backup drive that I can connect to the SCSI port. Can anyone suggest a good brand or model that can be acquired second hand?