Source : Free On-Line Dictionary of Computing

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".
     
        [{Jargon File}]