CompuServe Messages

I think the Schreiber scheme is somehow linked to the sector that happens to be allocated to a file that's stored in the root directory, masked with the "hidden" file attribute. If that's the case, then yes, restoring from a backup tape would require a new security key. I don't like that aspect, either. As for dongles, I know that I had a combination with the Topas dongle that prevented it from running with the 3DS dongle. And now I've got a Microstation dongle, and I think there's at least one other dongle in the office…