[hinkley]

The thing I always screwed up when copying was getting the disks backward and having to start over. Did you do anything special to reduce human error, like special stickers or colored disks?

For instance nobody in the office is allowed to use red floppies except for master disks.

[e12e]

Master disks didn't have write protection on?

[derefr]

I think that would be less about overwriting a master, and more about confusing some other disk for the master and sending it to the copier instead.