From owner-freebsd-hackers Wed Dec 27 18:59:35 1995 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id SAA06388 for hackers-outgoing; Wed, 27 Dec 1995 18:59:35 -0800 (PST) Received: from genesis.atrad.adelaide.edu.au (genesis.atrad.adelaide.edu.au [129.127.96.120]) by freefall.freebsd.org (8.7.3/8.7.3) with ESMTP id SAA06383 for ; Wed, 27 Dec 1995 18:59:32 -0800 (PST) Received: from msmith@localhost by genesis.atrad.adelaide.edu.au (8.6.12/8.6.9) id NAA00683 for hackers@freebsd.org; Thu, 28 Dec 1995 13:36:46 +1030 From: Michael Smith Message-Id: <199512280306.NAA00683@genesis.atrad.adelaide.edu.au> Subject: tape media verify (was re: 4GB baraccuda...) To: hackers@freebsd.org Date: Thu, 28 Dec 1995 13:36:46 +1030 (CST) In-Reply-To: <199512271939.AA02353@RockyMountain.rahul.net> from "Pete Delaney" at Dec 27, 95 11:39:36 am MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-hackers@freebsd.org Precedence: bulk (not really a -hackers issue, but maybe a useful snippet...) Pete Delaney stands accused of saying: > is recurring all the time, like my DAT tapes when I've got a write error, > the write ok, but on reading they get a media error, but then no matter > what I do, the error is always there. If I write a DAT and it reads ok, then > it seem to alreays read back ok. Seem the dat doesn't check what it writes. Tape media are inherently sequential, and can't verify what they've written without having seperate read and write heads. Not many have this; most tape units appear to rewind and check things like filemarks, but not bulk data. > -piet (The subject is close to heart, as my home system was down over christmas [phone screwup] and when I brought it back up, my boot disk [ST11200N] flaked and died. Big pout.) -- ]] Mike Smith, Software Engineer msmith@atrad.adelaide.edu.au [[ ]] Genesis Software genesis@atrad.adelaide.edu.au [[ ]] High-speed data acquisition and (GSM mobile) 0411-222-496 [[ ]] realtime instrument control (ph/fax) +61-8-267-3039 [[ ]] "Who does BSD?" "We do Chucky, we do." [[