Path: utzoo!attcan!uunet!pmafire!uudell!milano!cs.utexas.edu!swrinde!ucsd!pacbell.com!pacbell!sactoh0!jak
From: jak@sactoh0.SAC.CA.US (Jay A. Konigsberg)
Newsgroups: comp.unix.xenix.sco
Subject: Re: how do you determine end of tape? (floppy)
Message-ID: <4460@sactoh0.SAC.CA.US>
Date: 12 Dec 90 03:26:11 GMT
References: <79@gdx.UUCP> <2549@sixhub.UUCP>
Organization: Sacramento Public Access Unix, Sacramento, Ca.
Lines: 25

In article <79@gdx.UUCP> jay@gdx.UUCP (Jay A. Snyder) writes:
> 
> the tar that comes with SCO xenix knows when I gets to the end of a
> floppy, and then prompts for another.  Does anyone out there know how
> this is done?  I want to write a program that I can pipe the output of
> a program through so that I can write multiple floppies worth of data
> to foppies.
>

The file /etc/default/tar tells tar how big the media is. You can
specify it yourself. This will work for a 20MB tape:

tar cvfbk /dev/rct0 20 61440 /usr /u

c - collect data
v - verbose (display file names)
f - specify archive file (tape drive here)
b - blocking factor (typically 10, 18, or 20)
k - kbytes (1024 * 60)


-- 
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Jay @ SAC-UNIX, Sacramento, Ca.   UUCP=...pacbell!sactoh0!jak
If something is worth doing, it's worth doing correctly.