Back in the dual floppy drive days, I vividly remember getting the diskcopy a: b: right but accidentally placed the blank in a:.

I vividly remember doing it a second time some months later. But never again.

In my defense I was an idiot and was 8 or 9 years old, so fortunately it was just some shareware game disk that I was trying to copy for a friend only to lose my only copy.

The error made here is in an enormously more complex domain, but kind feels like they just accidentally low-level formatted an important diskette.