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Date: Fri, 19 Nov 2010 18:02:59 +0100
From: Matthias Apitz <guru@unixarea.de>
To: Hans Petter Selasky <hselasky@c2i.net>
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Cc: freebsd-usb@freebsd.org
Subject: Re: copying /dev/da0 with dd(1) to file: output differs
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El día Friday, November 19, 2010 a las 03:37:25PM +0100, Hans Petter Selasky escribió:

> On Friday 19 November 2010 15:33:37 Matthias Apitz wrote:
> > Hello,
> > 
> > How is this possible:
> > 
> > $ dd if=/dev/da0 of=f1
> > 7892087+0 records in
> > 7892087+0 records out
> > $ dd if=/dev/da0 of=f2
> > 7892087+0 records in
> > 7892087+0 records out
> > $ diff f1 f1
> > Files f1 and f2 differ
> > 
> > (and no, /dev/da0s1a is not mounted).
> > 
> > Thx
> > 
> > 	matthias
> 
> Hi,
> 
> Can you dump the data into hex using hexdump -C and show us the difference.

Note: the output of the dd(1) is around 3.8 GByte. I compared the 1st
2.000.000 lines of the hexdump: no diff; any better tool to show the 1st
block which differs?

> Usually you would use bs=65536 (Does that change anything)?

Same result: they differ :-(

	matthias
-- 
Matthias Apitz
t +49-89-61308 351 - f +49-89-61308 399 - m +49-170-4527211
e <guru@unixarea.de> - w http://www.unixarea.de/