Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!seismo!cmcl2!yale!husc6!mit-eddie!genrad!decvax!decwrl!hplabs!hp-pcd!orstcs!sechrest From: sechrest@orstcs.UUCP (sechrest) Newsgroups: comp.bugs.4bsd Subject: Re: 4.2 BSD Installation problem Message-ID: <245900002@orstcs.UUCP> Date: Thu, 18-Dec-86 13:50:00 EST Article-I.D.: orstcs.245900002 Posted: Thu Dec 18 13:50:00 1986 Date-Received: Wed, 31-Dec-86 20:52:18 EST References: <491@ms3.UUCP> Organization: Oregon State University - Corvallis, OR Lines: 18 Nf-ID: #R:ms3:-49100:orstcs:245900002:000:796 Nf-From: orstcs!sechrest Dec 18 10:50:00 1986 We have sometimes had similar problems on our RA81`s. I have no specific understanding of what is going on, but it seems that we can eliminate some class of disc errors by replacing the spindle brushes and insuring good clean contacts on the ground wires. There was a suggestion on the net a long time ago that it was a static build up on the spindle. Dec has said that this should not happen, but they come in and change the brushes when I ask them. The normal sequence of failures starts out with a couple of errors and then it slowly builds up to many errors. The HDR errors are generally not the same. Ie they seem to move around the disc. If they get too bad the disc will get some serious trash on it, but we fix the problem before that. John Sechrest sechrest@orstcs