Date: Fri, 19 Nov 2010 18:21:09 +0100 From: Hans Petter Selasky <hselasky@c2i.net> To: Matthias Apitz <guru@unixarea.de> Cc: freebsd-usb@freebsd.org Subject: Re: copying /dev/da0 with dd(1) to file: output differs Message-ID: <201011191821.09308.hselasky@c2i.net> In-Reply-To: <20101119170259.GA3741@current.Sisis.de> References: <20101119143337.GA3023@current.Sisis.de> <201011191537.25867.hselasky@c2i.net> <20101119170259.GA3741@current.Sisis.de>
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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
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