CDROM optimizations? Udev ?

[Kim Lux]

Yours isn't optimized either.

One can change them manually using hdparm (see man hdparm), but the
kernel should set them better than this.  Messing around with drive
parameters is not something that Joe/Jane Average should have to do. 


On Thu, 2004-11-04 at 11:31 -0500, Mark Haney wrote:
> On Thu, 2004-11-04 at 11:28, Kim Lux wrote:
> > Could I ask some people to run hdparm on their cdroms and report their
> > findings to the list ?
> > 
> > ie: $/sbin/hdparm /dev/hdc     (typically, some CDROMs might mount
> > elsewhere.)
> > 
> > We've found some CDROMs are not optimized to use 32 bit access and with
> > the irq still masked.  This might result in poor performance when using
> > them as CD Burners or as a ripping source. 
> > 
> > Thanks.
> > 
> 
> Here's mine, Gateway (Samsung) notebook.
> 
> /dev/hdc:
>  HDIO_GET_MULTCOUNT failed: Invalid argument
>  IO_support   =  0 (default 16-bit)
>  unmaskirq    =  0 (off)
>  using_dma    =  1 (on)
>  keepsettings =  0 (off)
>  readonly     =  0 (off)
>  readahead    = 256 (on)
>  HDIO_GETGEO failed: Invalid argument
> 
> Question is, how do I change those parameters?
> 
> > 
> > 
> > -- 
> > Kim Lux (Mr.)  Diesel Research Inc
> 
> --------------------------------------
> Mark Haney
> Network Administrator
> InterAct Public Safety Systems
> mhaney at interactsys.com
> Fedora Core release 2 (Tettnang) Kernel: 2.6.8-1.521 GNU/Linux 
> 11:31:09 up 23 min, 2 users, load average: 0.83, 1.06, 0.87 
> -- 
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-- 
Kim Lux (Mr.)  Diesel Research Inc