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From: Hans Petter Selasky <hselasky@c2i.net>
To: Matthias Apitz <guru@unixarea.de>
Date: Fri, 19 Nov 2010 18:21:09 +0100
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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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On Friday 19 November 2010 18:02:59 Matthias Apitz wrote:
> El d=EDa Friday, November 19, 2010 a las 03:37:25PM +0100, Hans Petter Se=
lasky=20
escribi=F3:
> > On Friday 19 November 2010 15:33:37 Matthias Apitz wrote:
> > > Hello,
> > >=20
> > > How is this possible:
> > >=20
> > > $ dd if=3D/dev/da0 of=3Df1
> > > 7892087+0 records in
> > > 7892087+0 records out
> > > $ dd if=3D/dev/da0 of=3Df2
> > > 7892087+0 records in
> > > 7892087+0 records out
> > > $ diff f1 f1
> > > Files f1 and f2 differ
> > >=20
> > > (and no, /dev/da0s1a is not mounted).
> > >=20
> > > Thx
> > >=20
> > > 	matthias
> >=20
> > Hi,
> >=20
> > Can you dump the data into hex using hexdump -C and show us the
> > difference.
>=20
> 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?
>=20
> > Usually you would use bs=3D65536 (Does that change anything)?
>=20
> Same result: they differ :-(
>=20
> 	matthias

bsdiff ?

=2D-HPS