copying /dev/da0 with dd(1) to file: output differs

[Hans Petter Selasky]

On Friday 19 November 2010 18:02:59 Matthias Apitz wrote:
> 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

bsdiff ?

--HPS