Re: Unbelievable slow speeds when burning DVDs

[Vasileios Gkanis <gkanis@cems.umn.edu>]

Unfortunately, this is a laptop and I can not change the IDE cables.
The good thing is that I burned a DVD with Cdrecord-ProDVD and the maximum 
speed was 2.3x and the average speed was 2x. Now, I do not want to be greedy 
here, but since the driver can burn up to 8x and the disc supports 16x, why 
the speed remained at 2x.
I have a similar problem in Windows (Nero), where the speed is about ~4x, and 
I am talking with the manufacturer about it.

Thank you,
Vasilis

On Wednesday 13 July 2005 08:34 am, Bill Davidsen wrote:
> Vasileios Gkanis wrote:
> >>Is DMA enabled on the burner? hdparm /dev/hd...
> >
> >Yes DMA is enabled
>
> If you have the HD and the burner on the same IDE cable they *may* be
> interfering with each other. If you can try putting the burner on
> another cable it would give you a data point, and might help.
>
> I assume that your burner really is faster than the speed you are
> seeing, and you're using fast media.
>
> >hdparm /dev/hda
> >
> >/dev/hda:
> > multcount    = 16 (on)
> > IO_support   =  1 (32-bit)
> > unmaskirq    =  1 (on)
> > using_dma    =  1 (on)
> > keepsettings =  1 (on)
> > readonly     =  0 (off)
> > readahead    = 256 (on)
> > geometry     = 16383/255/63, sectors = 80026361856, start = 0
> >
> >hdparm /dev/hdb
> >
> >/dev/hdb:
> > IO_support   =  1 (32-bit)
> > unmaskirq    =  1 (on)
> > using_dma    =  1 (on)
> > keepsettings =  1 (on)
> > readonly     =  0 (off)
> > readahead    = 256 (on)
> > HDIO_GETGEO failed: Invalid argument