From: utzoo!decvax!ucbvax!CAD:tektronix:teklabs!ogcvax!metheus!cdi!caf Newsgroups: net.micro.pc Title: Can MS-DOS handle 640kb drives? Article-I.D.: cdi.141 Posted: Fri Dec 31 03:28:45 1982 Received: Sat Jan 1 03:44:20 1983 Does anyboby know hoe to patch IBM DOS 1.1 to use 80 tracks instead of just 40 tracks on double sided 5.25" drives?? I have a CP/M for the PC that works great with "octal" drives (640kb/drive) but need info on how to get MS-DOS to do the same trick. 320kb per drive just doesn't cut it. Chuck Forsberg, Chief Engr, Computer Development Inc. 6700 S. W. 105th, Beaverton OR 97005 (503) 646-1599