Resurrecting a Macintosh Plus
blog.rekawek.eu
blog.rekawek.eu
If booting from a floppy would be enough then Rescue My Classic Mac is a way to go.
[1] http://www.bigmessowires.com/floppy-emu/ [2] http://rescuemyclassicmac.com/
[1] https://en.wikipedia.org/wiki/Hard_Disk_20 [2] http://www.codesrc.com/mediawiki/index.php?title=SCSI2SD