Westpac Bank losing a whole data centre floor of these 3380 DASDs in the late 1980’s when the water-based fire sprinklers went off.
That ASIO, instead of trading in their old 3380’s, had the disks ground up. Information security was the reason given.
A computer operator, during a mainframe shutdown procedure, thinking that because the 3380 was taking too long to power off, flicked the emergency power off switch.
Resetting the switch required a visit from an IBM Customer Service Engineer.
Disks shattering at (high rotational) speed, and exploding out the side of the cabinet. Urban myth, or not? Heard it happening from a number of mainframe operators over the years. So there might be a grain of truth there.
Vacant data centre floors caused by the 3380 & 3390’s being replaced by the much smaller IBM 9394 RAMAC units.