hdparm returns HDIO_SET_DMA failed: Inappropriate ioctl for device

[Antonio Olivares]

Following the advice below
 Make sure the DMA is enabled for your DVD-ROM,
  otherwise playback will be 'jumpy'.

[root at localhost ~]# hdparm -d1 /dev/scd0 

/dev/scd0:
 setting using_dma to 1 (on)
 HDIO_SET_DMA failed: Inappropriate ioctl for device
[root at localhost ~]# hdparm -d1 /dev/cdrom

/dev/cdrom:
 setting using_dma to 1 (on)
 HDIO_SET_DMA failed: Inappropriate ioctl for device
[root at localhost ~]# 


The cdrom device is no longer /dev/hdX where X can be any letter and now by using k3b I found out that scd0 is the new name.  This reminds me of FreeBSD, the new naming conventions.  The hard drive now is /dev/sdX where X , yes I saw this before no worries.  What does this "Inappropriate ioctl for device" mean?

Regards,

Antonio 




 
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