Activación DMA para el cdrom

[lachata]

El dom, 24-04-2005 a las 19:02 -0300, thirtankara escribió:
> El 24/04/05, lachata<lachata en gmail.com> escribió:
> >  al hacer "sudo hdparm -tT /dev/hdc" me sale:
> > 
> > /dev/hdc:
> > read() failed: Input/output error
> >  Timing buffered disk reads:  read() failed: Input/output error
> > 
> 
> ¿Tienes puesto un cd en la unidad?


	Sí, de hecho me lo monta automáticamente sin problema. Me sale ese
error antes y después de montado.





> 
> > Si hago "sudo hdparm  /dev/hdc", me sale lo siguiente:
> > 
> > /dev/hdc:
> >  IO_support   =  0 (default 16-bit)
> >  unmaskirq    =  0 (off)
> >  using_dma    =  1 (on)
> 
> Según esto ya tienes habilitado el dma



	Sí, supongo, pero al intentar grabar un cd me saca esto:


cdrecord: fifo was 0 times empty and 1 times full, min fill was 0%.
cdrecord: fifo had 64 puts and 0 gets.
cdrecord: Try to use 'driveropts=burnfree'.
cdrecord: Max DMA data speed is 9.
cdrecord: DMA speed too slow (OK for 9x). Cannot write at speed 16x.
cdrecord: WARNING: This causes a high risk for buffer underruns.
cdrecord: Permission denied. WARNING: Cannot set priority using
setpriority().
cdrecord: Operation not permitted. WARNING: Cannot set RR-scheduler
SCSI buffer size: 64512
cdrecord: Warning: using unofficial version of libscg (ubuntu-0.8ubuntu1
'@(#)scsitransp.c	1.91 04/06/17 Copyright 1988,1995,2000-2004 J.
Schilling').
Linux sg driver version: 3.5.27
Warning: Open by 'devname' is unintentional and not supported.
scsibus: -2 target: -2 lun: -2
devname: '/dev/hdc'
scsidev: '/dev/hdc'
cdrecord: WARNING: This causes a high risk for buffer underruns.
cdrecord: Permission denied. WARNING: Cannot set priority using
setpriority().
cdrecord: Operation not permitted. WARNING: Cannot set RR-scheduler
cdrecord: If you have unexpected problems, please try Linux-2.4 or
Solaris.
cdrecord: There are unsettled issues with Linux-2.5 and newer.
cdrecord: Warning: Running on Linux-2.6.10-5-386
cdrecord: Continuing in 5 seconds...
cdrecord: Future versions of cdrecord may have different drive dependent
defaults.
cdrecord: Asuming -tao mode.
cdrecord: No write mode specified.



	¿Alguna luz entre tanta tiniebla?