[MPlayer-DOCS] Some points for cd-dvd.xml

[Jiri Heryan]

About a line 31 in cd-dvd.xml is sugested to use "hdparm" or "cdspeed" 
for slow down IDE-CDROMs and few lines after is something like there is 
no solution for  SCSI drives.

I've no experience with cdspeed but hdparm failing with IDE-CD if you 
use an IDE-SCSI emulation for cd writer. Best solution (after hard 
searching) is set a speed=<speed> option to mount command. This work 
better for me than hdparm even in native ATAPI with my writer, because 
this drive resets its speed setting with every cd exchange so it need 
run hdparm many times (boring and slow).

Maybe it is a solution for SCSI drives too. I can't prove it myself, 
have no native SCSI.

Next we should point reasonable speed settings because all drives do not 
support many speeds. For example my cd writer supports about 15 various 
speeds but my previous toshiba cd-rom could be set to 14x and 40x only, 
so if  I set 24x it turn out as 40x (noisy) but after I set it <=14x , 
it slowed down.

In my experience is 8x speed reasonable minimum and 24x reasonable 
maximum with noise under fans level.

Any ideas?

Jiri