Re: how to set DVD read speed for Pioneer DVD-303S ?

[Erik Andersen]

On Wed Jan 05, 2000 at 08:41:32PM +0100, Harald Koenig wrote:
> does anyone know details about Pioneer DVD-303S drive how to set 
> the read speed for DVD media ?
> 
> with CDROM media I get up to 4.6MB/sec (32x) as specified and expected, 
> but when reading DVD media I only get sustained 2.7 MB/sec (2x) for the 
> whole disc whereas that drive should be 2x-6x (up to 8.1 MB/sec) for DVDs.
> 
> does anyone have techincal/scsi docs for that drive ?

Have you tried something like:

    #include <stdio.h>
    #include <stdlib.h>
    #include <fcntl.h>
    #include <linux/cdrom.h>
    #include <sys/ioctl.h>

    /* Max it out */
    #define HOWFAST 0

    main(int ac, char ** av) 
    {
      char * device = "/dev/scd0";
      int fd;
      int status;
      fd = open(device, O_RDONLY | O_NONBLOCK);
      if (fd < 0) {
	perror("Can't open device: ");
	exit(-2);
      }
      /* `0' means auto-selection, you might also try big numbers :) */
      status=ioctl(fd, CDROM_SELECT_SPEED, 0);
      if (status) {
	perror("Can't set speed: ");
	exit(-1);
      }
    }

Also check out the drive speed field when running
    cat /proc/sys/dev/cdrom/info
and see if it changes when running the setspeed app.

 -Erik

--
Erik B. Andersen   Web:    http://www.xmission.com/~andersen/ 
                   email:  [e-mail]
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