Re: Unable to burn at 4x using cdrecord and dvd+rw-tools
Il Thu, Mar 04, 2004 at 12:41:43PM +0100, Andy Polyakov ha scritto:
> > It refuse to work at 4x (with 4x media of course) even using -force.
> > dvd+rw-tools shows the same behaviour.
> Complement your report with actual output from growisofs, which would
> support this.
It just said that current write speed was 2x1385KBps (or maybe 2.4,
> > INQUIRY: [_NEC ][DVD_RW ND-1300A ][1.0A]
> > GET [CURRENT] CONFIGURATION:
> > Mounted Media: 1Bh, DVD+R
> > GET [CURRENT] PERFORMANCE:
> > Write Performance: 3.9x1385=5408KB/s@[0 -> 2295104]
> ^^^ Point is that recording should have
> proceeded at 4x and if it didn't actually, then something else was
> wrong. E.g. DMA might have been off, or you might have suffered from
> scheduling/buffering problems (see
> http://lists.debian.org/cdwrite/2003/cdwrite-200312/msg00226.html for
No, DMA was on and I was burning big tar.bz2 files (about 1GB each). DVD
drive and HD are on different channel and the partition is not
frammented. Catting files to /dev/null show a tput of about 50MBps.
> There also is a chance that this particular media brand is
> poorly supported by firmware. Yes, the latter is a bit far reached
> statement, firmware being simply lying about write speed, but there were
> reports which can be interpreted in this way (see
> http://lists.debian.org/cdwrite/2004/cdwrite-200403/msg00015.html for
> example). A.
That may be the case. I was using Verbatim media, I bought them because
they are supported by NEC . Now I'm burning at 4x using Magnex DVD-R
media with growisofs without problems. cdrecord still refuse to work at
4x though. Guess that I'll stick to growisofs ;)
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