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Date:      Fri, 4 Sep 1998 11:44:21 -0700 (MST)
From:      "Chad R. Larson" <chad@freebie.dcfinc.com>
To:        dkelly@hiwaay.net (David Kelly)
Cc:        fty@cisco.com, freebsd-stable@FreeBSD.ORG
Subject:   Re: 8mm tape block size max - changed?
Message-ID:  <199809041844.LAA15768@freebie.dcfinc.com>
In-Reply-To: <199809040257.VAA17656@nospam.hiwaay.net> from David Kelly at "Sep 3, 98 09:57:35 pm"

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> Frank Terhaar-Yonkers writes:
> > I recently upgraded from 2.0.x where I routinely used a block size of
> > 128b with tar and dump.  Using 2.1.7 I get: st0: 64512-byte record too big
> > when I try to read the old tapes.
> > 
> > Now I have all these old tapes I can't read.  Am I missing something?
> 
> So you used "tar -cvb 128 files" to write a tar tape?
> 
> Would suggest you try using tcopy to determine what blocksize is being
> used but I just tried it myself and it didn't work right at all.
> Multiple tape blocks were read to serve one read(). If this is 
> happening to you then that may be the key to the puzzle:

Or,

    dd if=/dev/tape of=/tmp/junk bs=64k count=1
    ls -l /tmp/junk

should tell you the size of the tape blocks.

	-crl
--
Chad R. Larson (CRL15)   602-953-1392   Brother, can you paradigm?
chad@dcfinc.com chad@larsons.org chad@anasazi.com larson1@home.net   
DCF, Inc. - 14623 North 49th Place, Scottsdale, Arizona 85254-2207

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