Date: Mon, 24 Jun 1996 08:25:58 +0200 From: Norbert Bladt <abladtn@autelca.ascom.ch> To: gwk@cray.com Cc: gilles.tschopp@aletsch.esis.vsnet.ch, scsi@freebsd.org Subject: Re: How to use Syquest EZ-135 as backup drive ? Message-ID: <31CE34F6.794BDF32@autelca.ascom.ch> References: <199606201626.SAA05312@racer.dkrz.de>
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Georg-W. Koltermann wrote: > > >>>>> "Gilles" == Gilles Tschopp <gilles.tschopp@aletsch.esis.vsnet.ch> writes: > Gilles> Hello, I'm an beginner of the Unix world. I would like to > Gilles> know how to manage backup of my FreeBSD system with the > Gilles> TAR command. I have a Syquest EZ-135 plugged on the SCSI > Gilles> subsystem. How to do ? > Gilles> > Gilles> A lot of thanks. > Gilles> > Gilles> Gilles Tschopp. > Gilles> ******************************************* Gilles > Gilles> Tschopp, Informaticien de gestion ES > Gilles> gilles.tschopp@esis.vsnet.ch http://icare.itech.ch > Gilles> http://esis.vsnet.ch http://www.vsnet.ch > Gilles> ******************************************* > Gilles> > Gilles> > > Try > cd /someplace This is OK. > tar cvfb /dev/rst0 126 somefiles This is a bad idea and a wrong answer, too. I think that the EZ-135 is not a tape drive and therefore it is not detected as "rst0" ! Instead it will be some sort of harddisk. Now, the problem is, giving a real step-by-step instruction for a harddisk you don't know the name of, i.e. I can guess that it won't be sd0, but what ? Giving the wrong answer here will destroy the ifnormation on any other disk. OK. Now to my answer: Because the EZ-135 is not a tape drive, tar (Tape ARchive) might not be a good idea to use. Why not just copy the files from your harddisk to this removable disk ? As far as I know, there is an "-r" option to the copy command to do the copy recursively, right ? This could be done if you want to do a backup of your (the users) files. On the other hand, if you want to do a multi-volume backup to several of those disks, you might have to use GNU-tar with the "-M" option and use the right devicename for the EZ-135 disk, which I can't tell without seeing at least part of the boot sequence of your system, sorry. Giving the wrong answer here, would, as said before, destroy any information on the wrong disk ! Regards, Norbert. -- Norbert Bladt Head System Software Development ascom Autelca AG Payphone and Cashless Transaction Systems Worbstrasse 201 CH-3073 Guemligen, Switzerland abladtn@autelca.ascom.ch VOICE: +41 31 999 6552, FAX: +41 31 999 6575
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