[NBLUG/talk] Speeding up CDR burns

Robert Hayes rhayes at silcom.com
Tue Feb 1 18:05:10 PST 2005


On Tuesday 01 February 2005 12:24 pm, Troy Arnold wrote:
> On Tue, Feb 01, 2005 at 11:57:47AM -0800, Robert Hayes wrote:
> > Greetings, all.
> >
> > I'm wondering what I can do to increase the speed of my cd burns.
> >
> > The drive is a Plextor rated to burn CDRs at 24X.
> > The best reliable burn speed I've gotten is 10X.
> > At 12X the buffer is prone to underrun if anything else is happening on
> > the box.
> >
> > The box is a 2.2GHz with 512MB ram. I'm running Debian 3.0. The drive is
> > a 30GB 7200 rpm and I've optimized the throughput with hdparm.
> >
> > My cdrecord is Cdrecord-Clone 2.01.01a01
> > The cdrdao is Cdrdao version 1.1.9
> >
> > Usually I just run K3B to burn files.
> > The cdrecord buffer size is set to 128MB.
> > The cdrdao block size is set to 128 blocks.
>
> Is this a 2.4 kernel series or 2.6?
> If 2.6 are you still using scsi emulation for your cd drive? (you
> shouldn't be)
The kernel is 2.4, and the drive is /dev/scd0.
>
> Some things to try:
> run k3b as root
Running as root doesn't seem to change anything, nor does running from the 
command line. 
> try running cdrecord from the command line.
> See if Knoppix is any better at burning.
This installation is the hard drive install of Knoppix 3.3
>
> Your box should be able to burn at the full speed of that drive even
> while under reasonable load.
>
> -troy
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