From The Free On-line Dictionary of Computing (19 January 2023):
gronk
/gronk/ Popularised by Johnny Hart's comic strip "B.C." but
the word apparently predates that.
1. To clear the state of a wedged device and restart it.
More severe than "to frob" (sense 2).
2. [TMRC] To cut, sever, smash, or similarly disable.
3. The sound made by many 3.5-inch diskette drives. In
particular, the microfloppies on a Commodore Amiga go
"grink, gronk".