On 5/23/05, Richard D <[EMAIL PROTECTED]> wrote: > > The interrupt levels change a bit but still stay above 80% :( > > I think my motherboard is not fully supported.
You think correctly. Specifically, the IDE controller in the ATI chipset is not supported, so OpenBSD is falling back to a generic IDE driver, which is functional, but lacks DMA transfers, which means your transfer rate is limited to about 3MB/sec and CPU usage is very high, as you have seen. These are the relevant sections of your dmesg log. For a supported IDE controller, it would note that DMA transfers were in use, rather than "16-sector PIO". ==== > dmesg: > pciide0 at pci0 dev 17 function 0 vendor "ATI", unknown product 0x437a > rev 0x00: DMA (unsupported), channel 0 configured to native-PCI, > channel 1 configured to native-PCI > pciide0: using irq 10 for native-PCI interrupt > pciide0: channel 0 ignored (not responding; disabled or no drives?) > pciide0: channel 1 ignored (not responding; disabled or no drives?) > pciide1 at pci0 dev 18 function 0 vendor "ATI", unknown product 0x4379 > rev 0x00: DMA (unsupported), channel 0 configured to native-PCI, > channel 1 configured to native-PCI > pciide1: using irq 11 for native-PCI interrupt > pciide1: channel 0 ignored (not responding; disabled or no drives?) > pciide1: channel 1 ignored (not responding; disabled or no drives?) > pciide2 at pci0 dev 20 function 1 vendor "ATI", unknown product 0x4376 > rev 0x00: DMA (unsupported), channel 0 configured to compatibility, > channel 1 configured to compatibility > wd0 at pciide2 channel 0 drive 0: <ST380011A> > wd0: 16-sector PIO, LBA48, 76319MB, 156301488 sectors > wd1 at pciide2 channel 0 drive 1: <WDC WD205AA> > wd1: 16-sector PIO, LBA, 19569MB, 40079088 sectors > atapiscsi0 at pciide2 channel 1 drive 0 > scsibus0 at atapiscsi0: 2 targets > cd0 at scsibus0 targ 0 lun 0: <ATAPI, DVD DD 2X16X4X16, G7L9> SCSI0 > 5/cdrom removable ==== Your best solution at this point (assuming you continue using the same motherboard) would be to get a PCI IDE card (such as Promise Ultra 100, etc.), which can be found for about $25 at online vendors, and will get you proper DMA transfers. -Andrew
