Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!uunet!dino!ux1.cso.uiuc.edu!ux1.cso.uiuc.edu!osiris.cso.uiuc.edu!mdonahue From: mdonahue@osiris.cso.uiuc.edu Newsgroups: comp.sys.ibm.pc Subject: Re: Help needed for MFM drive with RLL Message-ID: <7700091@osiris.cso.uiuc.edu> Date: 1 Dec 89 01:33:34 GMT References: <74452@<1989Nov29> Lines: 4 Nf-ID: #R:<1989Nov29:74452:osiris.cso.uiuc.edu:7700091:000:375 Nf-From: osiris.cso.uiuc.edu!mdonahue Nov 30 16:25:00 1989 I have heard some rumors that seagate has put hardware in some of its MFM drives to prevent them from being formatted RLL (In this way you are forced to purchase a "RLL" drive from seagate to use them RLL. As I said this was rumored but it may be true and could be causing your problem. This is what happens one company gets control of 70 % of the market. Mike