Realizing what i had done when the old powermac refused to boot up with a zip-drive stuck into the SCSI port... the funny smell... fuuuu.... luckily the machine survived, the zip-drive didn't. To my defence, it was 8 o'clock in the morning, and it seemed like an obvious thing to do for some weird reason. Had a similar experience with my old A3000 and DSS8+ ... both survived.