Path: utzoo!attcan!uunet!lll-winken!ames!haven!decuac!felix!info-ultrix
From: quentin@umb.umb.edu (Quentin Fennessy)
Newsgroups: comp.unix.ultrix
Subject: Re: tk70 density and length
Message-ID: <88436@felix.UUCP>
Date: 22 Mar 89 18:36:28 GMT
References: <87714@felix.UUCP>
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Reply-To: quentin@umb.umb.edu (Quentin Fennessy)
Organization: Dept of Math and CS, UMass Boston.
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Reply-to: quentin@umb.umb.edu (Quentin Fennessy)

In article <87714@felix.UUCP> rusty@hplabs.UUCP writes:
>I suspect this is an old question.  I just brought up 4.3bsd tahoe on
>a VAXstation 3200.  When I use dump, I need to tell it both the
>density and length of the tape.  What are these numbers for the TK70
>in high density mode?

A TK70 is 600 feet long, and runs at 10240 bpi density.
This reminds me of a question I have had for a while-
To actually fit 296 MB on a TK70, I have to lie to dump(8) (Ultrix3.0)
and tell it is 4800 feet long!
So, my command line is something like: dump 0uds 10240 4800 /dev/rra0a

Digital has given me this as an answer. I think it is still a question.
Why do I have to say 4800 feet to use 600 feet?

THanks,
	Quentin Fennessy
	ITP boston, inc
	UMass Boston