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    SubjectRe: [BUG?] SIS IDE DMA errors
    Date
    > Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
    > ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
    > SIS5513: IDE controller at PCI slot 0000:00:02.5
    > SIS5513: chipset revision 208
    > SIS5513: not 100% native mode: will probe irqs later
    > SIS5513: SiS 961 MuTIOL IDE UDMA100 controller
    > ide0: BM-DMA at 0xb800-0xb807, BIOS settings: hda:DMA, hdb:pio
    > ide1: BM-DMA at 0xb808-0xb80f, BIOS settings: hdc:DMA, hdd:pio
    > hda: IC25N040ATMR04-0, ATA DISK drive

    ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
    SIS5513: IDE controller at PCI slot 00:02.5
    PCI: Found IRQ 10 for device 00:02.5
    SIS5513: chipset revision 0
    SIS5513: not 100% native mode: will probe irqs later
    SIS5513: SiS 962/963 MuTIOL IDE UDMA133 controller
    ide0: BM-DMA at 0x4000-0x4007, BIOS settings: hda:DMA, hdb:pio
    ide1: BM-DMA at 0x4008-0x400f, BIOS settings: hdc:pio, hdd:pio
    hda: IC35L090AVV207-0, ATA DISK drive


    Jul 27 04:22:26 mhfl4 kernel: hda: lost interrupt
    Jul 27 04:23:15 mhfl4 kernel: hda: dma_timer_expiry: dma status == 0x24
    Jul 27 04:23:25 mhfl4 kernel: hda: DMA interrupt recovery

    Running mostly 2.4 on this board, not using ACPI, Got similar problems
    with 2.4 and when running occasionally 2.6, but not as bad except with
    2.4.22-pre7.

    Suspect chipset related issue which should be looked into.

    You could try setting udma mode with hdparm -Xudma[12345] and see
    if it helps.

    I use from a script on startup

    sync
    hdparm -S 255 -K1 -c3 -Xudma5 /dev/hda.

    Note: IME, hdparm should not be used when there is substantial
    disk activity.

    Regards
    Michael


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