From owner-freebsd-questions@FreeBSD.ORG Wed Mar 16 09:19:09 2005 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id CF75716A4CE; Wed, 16 Mar 2005 09:19:09 +0000 (GMT) Received: from mailgw.dgrp.sk (mailgw.dgrp.sk [195.28.127.4]) by mx1.FreeBSD.org (Postfix) with ESMTP id 91FD143D1F; Wed, 16 Mar 2005 09:19:06 +0000 (GMT) (envelope-from lk@tempest.sk) Received: by mailgw.dgrp.sk (Postfix, from userid 1003) id 0185E34A5A9; Wed, 16 Mar 2005 10:19:02 +0100 (CET) Received: from webmail.tempest.sk (unknown [195.28.100.38]) by mailgw.dgrp.sk (Postfix) with ESMTP id 6EC8F34A5A4; Wed, 16 Mar 2005 10:18:50 +0100 (CET) Received: from lk.tempest.sk ([195.28.109.47]) by webmail.tempest.sk (Lotus Domino Release 6.5.2) with ESMTP id 2005031610184873-411 ; Wed, 16 Mar 2005 10:18:48 +0100 Received: from lk.tempest.sk (localhost [127.0.0.1]) by lk.tempest.sk (8.13.1/8.12.9) with ESMTP id j2G9IUn0001858; Wed, 16 Mar 2005 10:18:30 +0100 (CET) (envelope-from koren@lk.tempest.sk) Received: (from koren@localhost) by lk.tempest.sk (8.13.1/8.13.1/Submit) id j2G9IU5r001855; Wed, 16 Mar 2005 10:18:30 +0100 (CET) (envelope-from koren) Date: Wed, 16 Mar 2005 10:18:30 +0100 (CET) Message-Id: <200503160918.j2G9IU5r001855@lk.tempest.sk> From: Ludo Koren To: grog@FreeBSD.org In-reply-to: <20050315010407.GN12078@wantadilla.lemis.com> (grog@FreeBSD.org) References: <200503140938.j2E9c2EM024428@lk.tempest.sk> <20050315010407.GN12078@wantadilla.lemis.com> X-MIMETrack: Itemize by SMTP Server on Domino1/DGRP(Release 6.5.2|June 01, 2004) at 16.03.2005 10:18:48, Serialize by Router on Domino1/DGRP(Release 6.5.2|June 01, 2004) at 16.03.2005 10:18:50, Serialize complete at 16.03.2005 10:18:50 X-Spam-Checker-Version: SpamAssassin 3.0.2 (2004-11-16) on mailgw X-Spam-Level: X-Spam-Status: No, score=-2.5 required=5.0 tests=AWL,BAYES_00 autolearn=ham version=3.0.2 cc: freebsd-questions@FreeBSD.org Subject: Re: Backup on DDS-4 tapes X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 16 Mar 2005 09:19:09 -0000 > --pP0ycGQONqsnqIMP Content-Type: text/plain; charset=us-ascii > Content-Disposition: inline > On Monday, 14 March 2005 at 10:38:02 +0100, Ludo Koren wrote: >> Hi, >> >> I am using 5.2.1-RELEASE-p3 for backup on DDS-4 tapes 40GB in >> size. >> >> ... >> >> Why I cannot dump the filesystem on 2 tapes (it takes 3, it >> seems it works without compression) no matter if I use dump or >> cpio? What I am doing wrong? > You're using dump :-) > Dump is too stupid to understand compression or EOF marks, so > it errs on the side of caution. It's also IMO not a very good > backup medium unless you really want the incremental dump > facility. Even between different releases of FreeBSD there are > compatibility problems, and you can assume that there is no > compatibility at all between different operating systems. You > may find tar a better choice. Surprisingly http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/backup-basics.html in 16.1.7 suggests dump, though as the reference is used (maybe) outdated E. Zwicky link... Anyway, cpio cannot handle the problem too, and the tar in 5.2.1-RELEASE-p3 can handle multi-volume backup, but in the 5.3-STABLE don't according to the man page. I wonder what is then the best solution. Regards, lk