Slow dvd writing

[bobmitch]

robot Wrote: 
> I'm having a similar problem. NEC 3520A writer with 8x media that writes
> at just over 2x  :sad: .
> 
> If I do hdparm /dev/dvd after bootup I get:
> 
> > 
Code:
--------------------
  >   > /dev/dvd:
  > IO_support   =  0 (default 16-bit)
  > unmaskirq    =  0 (off)
  > using_dma    =  0 (off)
  > keepsettings =  0 (off)
  > readonly     =  0 (off)
  > readahead    = 256 (on)
  > HDIO_GETGEO failed: Invalid argument
--------------------
> > 
> 
> 
> I tried running:
> > 
Code:
--------------------
  >   > 
  > sudo hdparm -q -X udma2 -d1 -c1 -u1 /dev/dvd
--------------------
> > 
> 
> but get:
> 
> > 
Code:
--------------------
  >   > setting 32-bit IO_support flag to 1
  > setting unmaskirq to 1 (on)
  > setting using_dma to 1 (on)
  > HDIO_SET_DMA failed: Operation not permitted
  > IO_support   =  1 (32-bit)
  > unmaskirq    =  1 (on)
  > using_dma    =  0 (off)
--------------------
> > 
> 
> 
> Why can't I set the DMA mode for the drive?

What happens if you try just:


Code:
--------------------
    sudo hdparm -d1 /dev/hdc
--------------------


-- 
bobmitch