active DMA on boot "DVD/CDROM"

ZIYAD A. M. AL-BATLY zamb at
Thu May 19 20:44:31 UTC 2005

On Thu, 2005-05-19 at 20:27 +0300, foinux wrote:
> hi,
> i put this on hdparm.conf "command_line {
>         hdparm -d 1 /dev/hdc
> }
> "
> but on boot procsser i see this message "/dev/hdc : no such file or
> directory "
> what should i do than ?

Is DMA working for you (despite the error message)?  If yes, just ignore
the message.

In my system the same error message appears, but DMA *is* activated on
my device (by default, it's off.  I had to edit “hdparm.conf” just like
you to enable it).

run “sudo hdparm /dev/hdc” and see if DMA is enabled or not.


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