From owner-freebsd-questions  Mon Nov  9 21:03:44 1998
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Date: Mon, 9 Nov 1998 21:03:23 -0800 (PST)
From: Doug White <dwhite@resnet.uoregon.edu>
To: flygt@sr.se
cc: FreeBSD Questions <questions@FreeBSD.ORG>
Subject: Re: dump and Tandberg QIC drives
In-Reply-To: <19981105230125.A15599@sr.se>
Message-ID: <Pine.BSF.4.03.9811092101060.16987-100000@resnet.uoregon.edu>
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On Thu, 5 Nov 1998, Gunnar Flygt wrote:

> Is there anyone out there familiar with dump? I have a Tandberg
> MLR-drive that installes beautifully by FreeBSD. The problem is with
> dump. It seems that it wasn't written for drives that can do 16GB on one
> tape. If I try to make a backup of 500MB I get a īcalculationī from dump
> that it should take 52.36 tapes to make this backup. So I changed the
> density parameter to the value given by Tandberg 67700BPI. I get a
> better value. Now I need only 2.54 tapes to make my backup. There is not
> enough parameter setting to use with big tapes, as far as I can see. The
> default tape length is 2300 feet. my tape is only 1500 feet, but can
> still host 16GB.
> 
> Does anyone know?

You're getting caught in the old measurement format.  Try running dump as

dump -0auf /dev/nrst0 /

the a option says 'use the whole tape'.

If that does wierd things use the 'B' and 'b' options; see the dump
manpage.

Doug White                               
Internet:  dwhite@resnet.uoregon.edu    | FreeBSD: The Power to Serve
http://gladstone.uoregon.edu/~dwhite    | www.freebsd.org


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