http://mnembler.com/computers_mini_stories.html
"George Dragner always wore a belt with a metal dragon buckle. He was a colorful
character known for pissing off management. His most
famous act was tossing a chair through the window at a customer site. The customer refused
to believe that the lack of humidity in the room
was screwing up his magnetic tape media. As the tape heads depend on the moisture from
the air to prevent the magnetic oxide from being
torn off the media from the friction during a rewind. George broke the window to prove his
point. He was right ! "
There is a minimum RH specified for tape, but "tape heads depend on the moisture from
the air" ??