Activación DMA para el cdrom

[lachata]

El dom, 24-04-2005 a las 23:57 +0100, lachata escribió:
> El lun, 25-04-2005 a las 00:39 +0200, Robert escribió:
> > En/na lachata ha escrit:
> > > 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



	He solucionado una parte del problema... actualizando al kernel 2.6.10
para el 686. Es decir, al hacer "sudo hdparm -tT /dev/hdc", ya sale algo
como:

/dev/hdc:
 Timing cached reads:   344 MB in  2.02 seconds = 170.32 MB/sec
 Timing buffered disk reads:    2 MB in  3.25 seconds = 631.03 kB/sec


	Aunque si hago "sudo hdparm /dev/hdc", me sigue dando el mensaje:
/dev/hdc:
 IO_support   =  0 (default 16-bit)
 unmaskirq    =  0 (off)
 using_dma    =  1 (on)
 keepsettings =  1 (on)
 readonly     =  0 (off)
 readahead    = 256 (on)
 HDIO_GETGEO failed: Invalid argument


	
	Y algo sigue yendo mal, puesto que al intentar grabar un cd, me saca:




Drive DMA Speed: 2125 kB/s 12x CD 1x DVD
FIFO size      : 4194304 = 4096 KB
cdrecord: Drive needs to reload the media to return to proper status.
cdrecord: Cannot load media with this drive!
cdrecord: Try to load media by hand.
Track 01: data    71 MB        
Total size:       82 MB (08:08.05) = 36604 sectors
Lout start:       82 MB (08:10/04) = 36604 sectors
Current Secsize: 2048
ATIP info from disk:
  Indicated writing power: 5
  Reference speed: 2
  Is not unrestricted
  Is erasable
  ATIP start of lead in:  -12900 (97:10/00)
  ATIP start of lead out: 359849 (79:59/74)
  1T speed low:  0 (reserved val  0) 1T speed high:  4
  2T speed low:  0 (reserved val  5) 2T speed high:  0 (reserved val 12)
  power mult factor: 4 5
  recommended erase/write power: 3
  A1 values: 02 4A B0
  A2 values: 5C C6 26
Disk type:    unknown dye (reserved id code)
Manuf. index: -1
Manufacturer: unknown (not in table)
Manufacturer is unknown because of the orange forum embargo.
As the orange forum likes to get money for recent information,
it may be that this media does not use illegal manufacturer coding.
Trying to clear drive status.
Re-load disk and hit <CR>
Controlling file not open for reading, send SIGUSR1 to continue.



	He leído en el foro de ubuntu que hay otro compañero que le pasa lo
mismo, pero no hay respuestas para ello...

	Agradecería cualquier idea.