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Date:      Fri, 17 May 2002 14:08:44 +0800
From:      Igor M Podlesny <poige@morning.ru>
To:        freebsd-questions@freebsd.org
Subject:   writing ISO, then reading it and seeing it has been grown!...
Message-ID:  <20020517140844.A65336@mars-gw.morning.ru>

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Hello!

I'm really sorry for wasting your time, but my searching through the Inet
for the answer gave no results...

The problem situatuion: assume, we have a file that is an ISO image.
Then, we burncd it and, later, took ISO image back with
dd (if=/dev/acd0c of=n44 bs=2k)

To my surprise the original ISO image and back-copied one have different
lengths!

Take a look:

========X-8========X-8========X-8========X-8========X-8=========
bash-2.05# ls -l n44 4.4-mini.iso && bc
-r--------  1 root  wheel  187072512  2 may 16:52 4.4-mini.iso
-r--------  1 root  wheel  187076608 16 may 12:23 n44
bc 1.06
Copyright 1991-1994, 1997, 1998, 2000 Free Software Foundation, Inc.
This is free software with ABSOLUTELY NO WARRANTY.
For details type `Warranty'.
187076608-187072512
4096
========X-8========X-8========X-8========X-8========X-8=========

I really wonder why does it happen?! =8-)

Thank you in advance,
-- 
Igor M Podlesny a.k.a. Poige
http://WwW.MorninG.RU/~poige

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