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    SubjectRe: DMA disabled and busy errors
    On Tue, 6 Apr 1999, Chris Wedgwood wrote:

    > On Fri, Apr 02, 1999 at 11:18:23PM -0600, Andre M. Hedrick wrote:
    >
    I've started seeomg the same problems on hda and hdb

    > > Care to name the chipset and drive combination with revisions?
    >
    > Intel VX440 mainboard;
    >
    Intel 440BX mainboard.

    > PIIX3: IDE controller on PCI bus 00 dev 39
    > PIIX3: not 100ative mode: will probe irqs later
    > ide0: BM-DMA at 0xffa0-0xffa7, BIOS settings: hda:DMA, hdb:pio
    > ide1: BM-DMA at 0xffa8-0xffaf, BIOS settings: hdc:DMA, hdd:pio
    >
    PIIX4: IDE controller on PCI bus 00 dev 39
    PIIX4: not 100% native mode: will probe irqs later
    ide0: BM-DMA at 0xf000-0xf007, BIOS settings: hda:pio, hdb:pio
    ide1: BM-DMA at 0xf008-0xf00f, BIOS settings: hdc:pio, hdd:pio
    hda: QUANTUM BIGFOOT_CY4320A, ATA DISK drive
    hdb: QUANTUM FIREBALL_TM1700A, ATA DISK drive
    hdc: PHILIPS CDD3610 CD-R/RW, ATAPI CDROM drive
    hdh: probing with STATUS(0x00) instead of ALTSTATUS(0x80)
    hdh: WEARNES CDD-1020, ATAPI CDROM drive
    ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
    ide1 at 0x170-0x177,0x376 on irq 15
    ide3 at 0x168-0x16f,0x36e on irq 10
    hda: QUANTUM BIGFOOT_CY4320A, 4134MB w/67kB Cache, CHS=527/255/63, DMA
    hdb: QUANTUM FIREBALL_TM1700A, 1628MB w/76kB Cache, CHS=827/64/63, DMA
    (ide3 is on an sb)

    > > Usually the chipset and the drive are not communicating at the same
    > > rates or one the two devices (drive or host adapter/mainboard)
    > > failed to correctly recognize one or the other. Manufacturer
    > > forgot to read something.
    >
    > It works 99% of the time, just every now and then, perhaps once a day under
    > light load, more often under heavier load, I get these:
    >
    > hda: timeout waiting for DMA
    > hda: irq timeout: status=0xd0 { Busy }
    > ide0: reset: success
    >
    Same here. Sometimes it then disables DMA on the drive as well.

    HTH

    --
    Mike <rickettm@ox.compsoc.net>

    Oh what a tangled web we weave, when first we practice to deceive.
    -- Shakespeare


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