From owner-freebsd-scsi Mon Oct 28 06:37:03 1996 Return-Path: owner-freebsd-scsi Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id GAA28097 for freebsd-scsi-outgoing; Mon, 28 Oct 1996 06:37:03 -0800 (PST) Received: from hda.hda.com (ip4-max1-fitch.zipnet.net [199.232.245.4]) by freefall.freebsd.org (8.7.5/8.7.3) with SMTP id GAA28079 for ; Mon, 28 Oct 1996 06:37:00 -0800 (PST) Received: (from dufault@localhost) by hda.hda.com (8.6.12/8.6.12) id JAA01140; Mon, 28 Oct 1996 09:16:39 -0500 From: Peter Dufault Message-Id: <199610281416.JAA01140@hda.hda.com> Subject: Re: SCSI harddisk trouble: MEDIUM ERROR In-Reply-To: <199610271552.HAA18645@GndRsh.aac.dev.com> from "Rodney W. Grimes" at "Oct 27, 96 07:52:40 am" To: rgrimes@gndrsh.aac.dev.com (Rodney W. Grimes) Date: Mon, 28 Oct 1996 09:16:39 -0500 (EST) Cc: freebsd-scsi@freebsd.org X-Mailer: ELM [version 2.4ME+ PL25 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-scsi@freebsd.org X-Loop: FreeBSD.org Precedence: bulk Well put - I should have read your message before responding. However: > ... Since we don't do read after write verify operations if > a data hard error occurs in the block during the write that is undeteced > during the read there is nothing that AWRE/ARRE can do about it... Do think this happens often? Are there situations where "write and verify" support would be worth the probable huge performance hit? -- Peter Dufault Real-Time Machine Control and Simulation HD Associates, Inc. Voice: 508 433 6936 dufault@hda.com Fax: 508 433 5267