Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site uw-beaver Path: utzoo!watmath!clyde!burl!ulysses!mhuxr!mhuxt!mhuxj!houxm!vax135!cornell!uw-beaver!info-mac From: info-mac@uw-beaver Newsgroups: fa.info-mac Subject: Disk Erasure Problem Message-ID: <207@uw-beaver> Date: Fri, 14-Dec-84 15:48:55 EST Article-I.D.: uw-beave.207 Posted: Fri Dec 14 15:48:55 1984 Date-Received: Sat, 15-Dec-84 03:14:00 EST Sender: daemon@uw-beaver Organization: U of Washington Computer Science Lines: 26 From: Rob GurwitzI have recently had several disks that have gotten progressively flakey and then unreadable. The problem sure looks like magnetization, since it seems to occur on disks that I put in and out of the drive frequently, like my MacTerminal disk. The symptoms start with occaisional system bombs, progress to occaisional and then more frequent disk unreadable messages, failure at various stages of startup (in the system, the finder, etc.), and finally nothing at all. If I reinit the disks and recopy them, they work fine. I've also verified the flakeyness by carrying the bad disks to other Macs and get similar results. I'm fairly careful with my disks and I don't think they've been exposed to unusual magnetic fields or high static. I called my dealer and am waiting for a replacement drive. Has anyone else had this experience? Should I avoid using my Mac at all until the new drive is installed? Is there some demagnitization procedure recommended by Apple? Rob Gurwitz BBN Laboratories gurwitz@bbn-unix decvax!bbncca!gurwitz