From owner-freebsd-scsi Mon Oct 14 13:37:03 1996 Return-Path: owner-freebsd-scsi Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id NAA24093 for freebsd-scsi-outgoing; Mon, 14 Oct 1996 13:37:03 -0700 (PDT) Received: from hda.com (ip95-max1-fitch.zipnet.net [199.232.245.95]) by freefall.freebsd.org (8.7.5/8.7.3) with SMTP id NAA24088 for ; Mon, 14 Oct 1996 13:36:53 -0700 (PDT) Received: (from dufault@localhost) by hda.com (8.6.11/8.6.9) id RAA19326; Mon, 14 Oct 1996 17:05:09 -0400 From: Peter Dufault Message-Id: <199610142105.RAA19326@hda.com> Subject: Re: Buslogic controller, Sync mode & a SCSI disk error To: jgreco@brasil.moneng.mei.com (Joe Greco) Date: Mon, 14 Oct 1996 17:05:03 -0400 (EDT) Cc: rgrimes@GndRsh.aac.dev.com, joerg_wunsch@uriah.heep.sax.de, freebsd-scsi@FreeBSD.org, jgreco@brasil.moneng.mei.com In-Reply-To: <199610141537.KAA24323@brasil.moneng.mei.com> from "Joe Greco" at Oct 14, 96 10:37:53 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 > > scsiformat(8) is destructive only, I can't fix a drive full of data > > with it. :-(. How hard would it be to extend it so that it does > > what the aha2940 ``verify'' mode does? > > Perhaps even with a nicer interface :-) Personally I am quite fond > of the "analyze" feature available in Sun format, but that is also a > fair amount of additional work. What do these utilities do? How do they look? How different is the behavior from doing a read/write loop over an unmounted raw disk after ensuring AWRE/ARRE are on, possibly with a read retry count and a "force write to sector N if you exceed read retry errors at sector N" option? Since these read failures typically indicate the drive tried its best already (and our system has issued additional retries also), I'm not sure of what these utilities do other than possibly turning off error checking and reading as much as it can. -- Peter Dufault Real-Time Machine Control and Simulation HD Associates, Inc. Voice: 508 433 6936 dufault@hda.com Fax: 508 433 5267