[ltp] T43, DMA on DVD drive

fire-eyes linux-thinkpad@linux-thinkpad.org
Sat, 28 Jan 2006 11:38:38 -0500


Wolfgang Karall wrote:
> On Fri, 2006-01-27 at 14:35 -0500, fire-eyes wrote:
> 
>>However upon trying to turn the DMA on I get a different error:
>>
>># hdparm -d 1 /dev/sr0
>>
>>/dev/sr0:
>> setting using_dma to 1 (on)
>> HDIO_SET_DMA failed: Inappropriate ioctl for device
> 
> 
> No need (and no way) to manually set the DMA mode, using the
> libata-Driver for the optical drive gives you DMA-like performance (as
> in proper throughput while keeping CPU utilization low) by default.
> 
> Regards
> WK

Ah! Yes, it seems to be working wonderfully now. Thanks a lot, Wolfgang!