#1 Re-initializing (NOT low level formatting) does NOT wipe out authorizations (floppy or challenge/response). However, the first time you boot PT on the freshy initialized drive, it may ask you to re-enter the responses, etc or re-insert the floppies for verification. #2 Challenge/responses are machine-specific. Yes, the challenge/response is stored on the drive, but the original challenge is specific (and 'locked') to that machine. Chris Hanson Digidesign