DAT! I'd pretty much forgotten them-- in my first post-college job I had to manage a backup system that used them, swapping them each night before I went home.

DAT! I'd pretty much forgotten them-- in my first post-college job I had to manage a backup system that used them, swapping them each night before I went home. It really hammered home the importance of backups when someone completely hosed a database and I had to restore things.