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    SubjectRe: IDE still misbehaving in pre-2.1.89-4 [WAS: Can't set UltraDMA mode 2 on Quantum Fireball SE]
    Adam D. Bradley wrote:

    > Unfortunately, IDE is unstable in 2.1.85 and on, at least under SMP.

    Correction: your system is unstable in 2.1.85. Cause unknown.

    > I've been done this booting w/o options and with the
    > "ide0=noautotune" option. Haven't tried a non-SMP kernel yet.

    Well.. try a non-SMP kernel then. I did receive other reports a few
    weeks back that newer SMP code was broken for some drivers, including IDE.

    > Feb 28 23:44:50 peter kernel: hda: write_intr: status=0xd0 { Busy }
    > Feb 28 23:44:50 peter kernel: ide0: reset: success
    > Feb 28 23:44:50 peter kernel: hda: recal_intr: status=0xd0 { Busy }

    After a unit reset, the hardware should no longer be "Busy".
    Something other than the IDE software is causing this condition.

    > Twin Pentium-MMX 166's, Gigabyte MB, 64 MB EDO
    > peter kernel: PIIX3: IDE controller on PCI bus 0 function 57
    > peter kernel: PCI->APIC IRQ transform: (B0,I7,P-1) -> -1
    > peter kernel: PIIX3: not 100% native mode: will probe irqs later
    > peter kernel: ide0: BM-DMA at 0xf000-0xf007, BIOS settings: hda:pio, hdb:pio
    > peter kernel: ide1: BM-DMA at 0xf008-0xf00f, BIOS settings: hdc:pio, hdd:pio
    > peter kernel: hda: QUANTUM FIREBALL ST3.2A, ATA DISK drive
    > peter kernel: hdb: MAXTOR LXT-340A, ATA DISK drive
    > peter kernel: hdc: TOSHIBA CD-ROM XM-5702B, ATAPI CDROM drive
    > peter kernel: ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
    > peter kernel: ide1 at 0x170-0x177,0x376 on irq 15
    > (P.S. - 2.1.84 was rock-solid-stable, and I didn't see much in 2.1.85
    > that should've touched IDE directly. IO-APIC changes maybe?

    Yeah, try it without the IO_APIC support.

    The Linux IDE guy

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