Thomas Sparrevohn wrote: > On Monday 25 October 2004 18:28, Victor Balada Diaz wrote: > >>On Monday 25 October 2004 18:12, fandino wrote: >> >>>Thanks to the excelent job of Thomas Sparrevohn I get 52MB/s, this is >>>an excerpt of their comments: >>> >>>"Changes the DMA speed to 66 - The Controller is a 100 controller and the >>>disks are 100 Disks but I think the default for the controller is 66 and >>>hence there are most likely a small initialisation difference between >>>Linux, NetBSD and FreeBSD" >> >>Hi >> >>please can you post how do you solved the problem? > > atacontrol mode <channel> DMA4 DMA4 > atacontrol mode <channel2> DMA4 DMA4 > > The reason is that the motherboard only supports ATA100 on two out of four IDE > channels and hence you need to force the two other channels to run at DMA66 How do you come to that conclusion ? There is no such limitation AFAIK. However you can only get a total sum of 133MB/s divided by number of disks (and minus some overhead on older system there is typically 110MB/s effective bandwidth).. The real explanation is much more likely that the timing specs are marginal (overclocked ?) for the disks, which causes problems.. -- -SørenReceived on Mon Oct 25 2004 - 16:00:32 UTC
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