DMA for CD-Drive at bootup (error)

'Forum Post ulist at
Mon Oct 3 08:36:29 UTC 2005

> with DMA enabled for the CD-Drive i always get at boot time an error
> like,
> this drive /dev/hdc is not known.
> what can i change here? something in the bootup procedure or is the
> configuration in hdparm.conf wrong?

I get the same error message, but on my system DMA is enabled
nevertheless. It's just an output bug, nothing more.

If in doubt you can check the status using *sudo hdparm -d /dev/hdc*
(without spesifying either d1 or d0 you can see the current status of
the drive)


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