On Wed, 2009-04-15 at 10:45 -0400, William L. Maltby wrote:> On Wed, 2009-04-15 at 15:46 +0200, Niki Kovacs wrote:> > Michael A. Peters a écrit :> > > > >>> > >> 1) Am I supposed to be root to use cdrecord and burn an .iso file?> > > > > > I've found it works much better if you are root.> > > > > > > I tried both, and see: cdrecord complains about not being able to set > > certain priorities while being run as user, which induces a high risk > > for buffer underruns. So I have my answer for that.> > > > Another cdrecord-related question. Usually I should be able to copy a CD > > as simply as that:> > > > $ dd if=/dev/cdrom of=copy.iso> > > > Then insert a blank CD, and:> > > > $ cdrecord -v -eject dev=/dev/cdrom copy.iso> > > > Now I did that for data CDs, and it works very well. I thought, normally > > this *should* also work for audio CDs, so I gave that a spin. But > > everytime I try it, dd stops short and gives me an "Input/output error" > > for /dev/hdc.> > > > I tried three different audio CDs, all three in good state. I can listen > > to them OK on the PC. But all I get with dd is a zero-byte-length > > copy.iso file.> > > > Any idea what's happening?> > Try padding copied image with a few hundred k of nulls.> > dd if=/dev/zero of=copy.iso \> seek=<number of output blocks to skip forward> bs=2048
OOPS! Forgot to limit the output. Add count=<number of blocks> to theend of the command.
> > <snip>
-- Bill
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