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 the end of the command. > > <snip> -- Bill