On Fri, 2008-02-08 at 19:35 +0100, Dominic Fandrey wrote: > Tom Evans wrote: > > On Fri, 2008-02-08 at 17:14 +0100, Dominic Fandrey wrote: > >> Tom Evans wrote: > >>> If I try to turn on DMA, I just get WDMA2, which just doesn't cut it: > >> I think any DMA mode is fast enough to handle a DVD drive. There's just no > >> necessity for more. > >> > > > > WDMA is not UDMA. Any UDMA variant would be enough. WDMA2 provides a > > maximum of 16MiB/s, which will frequently lead to buffer underruns > > viewing a DVD. UDMA2 provides a maximum of 33MiB/s, which IS plenty. > > 16MB/s is exactly what is needed for 12x DVD access. I think this is the > usual > speed for a Notebook drive nowadays and it suffices for me. > > >>>> # atacontrol mode acd0 udma5 > >>> current mode = WDMA2 > >> Same as for me. I'm satisfied with the speed of the drive. > > > > I'm rarely satisfied - I'm quite often not bothered enough to pursue :) > > Well, if 12x speed is not enough for you, you have to use an external drive. > This is not a driver issue. It's just what your drive supports.
The chipset supports UDMA6, the drive supports UDMA6, I should be happy with WDMA2 because 'thats what works'? Thanks for your 'help'. I'll continue on here from myself.
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