From owner-freebsd-questions  Sat Dec 29  9:44:20 2001
Delivered-To: freebsd-questions@freebsd.org
Received: from gwdu60.gwdg.de (gwdu60.gwdg.de [134.76.98.60])
	by hub.freebsd.org (Postfix) with ESMTP id F042C37B41C
	for <freebsd-questions@FreeBSD.ORG>; Sat, 29 Dec 2001 09:44:15 -0800 (PST)
Received: from localhost (kheuer@localhost)
	by gwdu60.gwdg.de (8.11.6/8.11.6) with ESMTP id fBTHi5Q30983;
	Sat, 29 Dec 2001 18:44:05 +0100 (CET)
	(envelope-from kheuer@gwdu60.gwdg.de)
Date: Sat, 29 Dec 2001 18:44:04 +0100 (CET)
From: Konrad Heuer <kheuer@gwdu60.gwdg.de>
To: Sam Drinkard <sam@wa4phy.net>
Cc: freebsd-questions@FreeBSD.ORG
Subject: Re: Dump Device?
In-Reply-To: <3C2DFE32.19E61C8B@vortex.wa4phy.net>
Message-ID: <20011229183907.M30937-100000@gwdu60.gwdg.de>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=X-UNKNOWN
Content-Transfer-Encoding: QUOTED-PRINTABLE
Sender: owner-freebsd-questions@FreeBSD.ORG
Precedence: bulk
List-ID: <freebsd-questions.FreeBSD.ORG>
List-Archive: <http://docs.freebsd.org/mail/> (Web Archive)
List-Help: <mailto:majordomo@FreeBSD.ORG?subject=help> (List Instructions)
List-Subscribe: <mailto:majordomo@FreeBSD.ORG?subject=subscribe%20freebsd-questions>
List-Unsubscribe: <mailto:majordomo@FreeBSD.ORG?subject=unsubscribe%20freebsd-questions>
X-Loop: FreeBSD.ORG


On Sat, 29 Dec 2001, Sam Drinkard wrote:

> Having figured out bad tapes were blowing up any type of tape activity,
> I now question *which* dump device is proper to use.  Have read all the
> stuff on dump, and the handbook entries about backups.  Is it proper to
> use /dev/nrsa0, /dev/sa0, or what?  Does it really matter ?

/dev/nsa0 will not rewind, /dev/sa0 will rewind before writing; /dev/rsa0
and /dev/nrsa0 are raw devices for byte-oriented i/o, while /dev/sa0 and
/dev/nsa0 are block devices for block oriented i/o. Thus, you should
/dev/sa0 or /dev/nsa0 with dump, depending on your wish to rewind or not
before writing begins.

For non-rewinding tape operations, you should take a look at the the mt
utility for tape control.

Best wishes

Konrad Heuer                                    Personal Bookmarks:
Gesellschaft f=FCr wissenschaftliche
   Datenverarbeitung mbH G=D6ttingen              http://www.freebsd.org
Am Fa=DFberg, D-37077 G=D6ttingen                   http://www.daemonnews.o=
rg
Deutschland (Germany)

kheuer@gwdu60.gwdg.de


To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-questions" in the body of the message