From owner-freebsd-scsi Thu Jun 6 06:31:09 1996 Return-Path: owner-freebsd-scsi Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id GAA27850 for freebsd-scsi-outgoing; Thu, 6 Jun 1996 06:31:09 -0700 (PDT) Received: from hda (ip86-max1-fitch.zipnet.net [199.232.245.86]) by freefall.freebsd.org (8.7.5/8.7.3) with SMTP id GAA27818; Thu, 6 Jun 1996 06:31:03 -0700 (PDT) Received: (from dufault@localhost) by hda (8.6.11/8.6.9) id JAA17446; Thu, 6 Jun 1996 09:34:59 -0400 From: Peter Dufault Message-Id: <199606061334.JAA17446@hda> Subject: Re: ERROR info:747d9d asc:11,0 Unrecovered read error, other SCSI , issues To: andrew@pubnix.net Date: Thu, 6 Jun 1996 09:34:58 -0400 (EDT) Cc: dror@hopf.dnai.com, freebsd-scsi@FreeBSD.ORG, freebsd-isp@FreeBSD.ORG In-Reply-To: from "Andrew Webster" at Jun 6, 96 07:10:25 am Reply-to: hdalog@zipnet.net X-Mailer: ELM [version 2.4 PL24] Content-Type: text Sender: owner-freebsd-scsi@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk > ate two of these Quantum XP34300 drives in two months, and it wasn't a news > server! > > This was a P133 with AHA-2940 with FreeBSD 2.0.5. What I'd noticed in > both cases was that when lots of seek activity occurs, occasionally, the > drive would stop seeking and a loud "ringing" sound would be heard from > the drive for a couple of seconds, and then it would continue seeking. > I've seen this in a couple of other vendor's drives as well... This may be a thermal recalibration of the servo mechanism. The old CDC drive I have makes a "KA-PROING" noise when it does it and it takes a few seconds to complete. -- Peter Dufault Real-Time Machine Control and Simulation HD Associates, Inc. Voice: 508 433 6936 dufault@hda.com Fax: 508 433 5267