DuckCorp Dico

Found one definition

1.                 From The Jargon File (version 4.4.7, 29 Dec 2003):
                   
   
   
                   
                     
   scag
    vt.
       To destroy the data on a disk, either by corrupting the filesystem or by
       causing media damage. “That last power hit scagged the system disk.”
       Compare scrog, roach.