Re: Heee haw
@Olaf
To make the disks dance, you needed to spin them up and spin them down - and then you could get them to walk (or play tunes). If they were out of balance then they’d shatter when they got spun up - so you can be sure that they were properly balanced in the factory. Of course, I don’t know anything about pre-1987 big iron (so things might have been different in deep pre-history) - and I’ve only ever seen disks shatter once (on a VAX).