Date: Thu, 12 Feb 2009 23:13:45 +0000 From: Chris Rees <utisoft@googlemail.com> To: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl> Cc: Tim Judd <tajudd@gmail.com>, Gary Kline <kline@thought.org>, Polytropon <freebsd@edvax.de>, FreeBSD Mailing List <freebsd-questions@freebsd.org> Subject: Re: How-to erase a DVD-RW Message-ID: <b79ecaef0902121513r210b175cr1aa57d350e136370@mail.gmail.com> In-Reply-To: <20090212235111.D97916@wojtek.tensor.gdynia.pl> References: <1234423939.27702.4.camel@ethos> <20090212101453.I81232@wojtek.tensor.gdynia.pl> <20090212105424.a710de5e.freebsd@edvax.de> <20090212141444.W81609@wojtek.tensor.gdynia.pl> <4994919E.3000803@gmail.com> <20090212235111.D97916@wojtek.tensor.gdynia.pl>
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2009/2/12 Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>: >>> which is exactly what i suggested - writing 0 byte disc >> >> >> that writes binary 0, the ASCII "NUL" character. /dev/zero is NOT a >> zero-size file. > > yes it is > > [wojtek@wojtek ~/NOBACKUP]$ dd if=/dev/null of=/dev/null bs=1 > 0+0 records in > 0+0 records out > 0 bytes transferred in 0.000037 secs (0 bytes/sec) > > > /dev/null simply gives EOF when trying to read But we're talking about /dev/zero, not /dev/null ... [chris@zeus]~% dd if=/dev/zero of=/dev/null bs=2 count=5 5+0 records in 5+0 records out 10 bytes transferred in 0.000050 secs (200684 bytes/sec) [chris@zeus]~% Chris -- R< $&h ! > $- ! $+ $@ $2 < @ $1 .UUCP. > (sendmail.cf)
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