On Tue, Nov 30, 2004 at 08:55:31PM -0000, [EMAIL PROTECTED] wrote: > The logical progression of that is that if dd between device nodes works > then copying to the offboard ide drives _should_ work. :-) Except dd > doesn't work :-(
There are two things you have to factor in. Each dev->dev copy goes via memory so its PCI->memory->PCI (very few exceptions to that). Secondly IDE uses the full PCI bandwidth and many controllers are quite rude citizens who will hog the entire PCI bus. Its actually hard for them to be otherwise. > 0x000f7b1c:0x14b68000:0x00004000 > ivtv: IRQ: IVTV_IRQ_DEC_DMA_ERR intr 2 > ivtv: DMA Registers State: xfer: 0x00000000, state: 0x00000003 dec_addr: Which suggests a controller held it off the bus. I've seen this quite a bit with various video capture devices. In some cases forcing PIO mode over DMA actually helped, or dropping the disk to UDMA33 Alan ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://productguide.itmanagersjournal.com/ _______________________________________________ ivtv-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/ivtv-devel
