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    SubjectPromise Ultra66 DMA problems.
    I've been searching and watching lists for a while trying to figure
    out whether this problem had been solved or not, and haven't found
    anything suitable...

    I'm experiencing two problems with a Promise UDMA66 controller
    (PDC20262) on hardware I'll list below. The first problem is that
    on bootup I get:

    Uniform Multi-Platform E-IDE driver Revision: 6.30
    ide: Assuming 33MHz system bus speed for PIO modes; override with
    idebus=xx
    PIIX4: IDE controller on PCI bus 00 dev 21
    PIIX4: chipset revision 1
    PIIX4: not 100%% native mode: will probe irqs later
    ide0: BM-DMA at 0xd800-0xd807, BIOS settings: hda:pio, hdb:pio
    ide1: BM-DMA at 0xd808-0xd80f, BIOS settings: hdc:DMA, hdd:pio
    PDC20262: IDE controller on PCI bus 00 dev 60
    PDC20262: chipset revision 1
    PDC20262: not 100%% native mode: will probe irqs later
    PDC20262: (U)DMA Burst Bit ENABLED Primary PCI Mode Secondary PCI
    Mode.
    ide2: BM-DMA at 0x9800-0x9807, BIOS settings: hde:pio, hdf:pio
    ide3: BM-DMA at 0x9808-0x980f, BIOS settings: hdg:pio, hdh:pio
    hdc: NEC CD-ROM DRIVE:282, ATAPI CDROM drive
    hde: Maxtor 91024U3, ATA DISK drive
    hdf: Maxtor 94098U8, ATA DISK drive
    hdg: QUANTUM FIREBALLP LM15, ATA DISK drive
    hdh: QUANTUM FIREBALLP LM30, ATA DISK drive
    ide1 at 0x170-0x177,0x376 on irq 15
    ide2 at 0xb000-0xb007,0xa802 on irq 11
    ide3 at 0xa400-0xa407,0xa002 on irq 11

    Then a hang. Mentioned a while back, this patch fixes the problem,
    and allows the machine to boot properly.

    --- /usr/src/linux-2.2.18-idepatch/drivers/block/ide-features.c Mon
    Jan 1 18:03:42 2001
    +++ ide-features.c Mon Jan 1 18:30:37 2001
    @@ -297,8 +297,10 @@
    SELECT_DRIVE(HWIF(drive), drive);
    SELECT_MASK(HWIF(drive), drive, 0);
    udelay(1);
    + /*
    if (IDE_CONTROL_REG)
    OUT_BYTE(drive->ctl | 2, IDE_CONTROL_REG);
    + */
    OUT_BYTE(speed, IDE_NSECTOR_REG);
    OUT_BYTE(SETFEATURES_XFER, IDE_FEATURE_REG);
    OUT_BYTE(WIN_SETFEATURES, IDE_COMMAND_REG);
    I then found that I randomly get "Timeout waiting for DMA" messages
    prior to a complete system hang.

    I tried forcing all of the drives into UDMA mode 2 (hdparm -X66) and
    this seemed to make the problem a bit better, but I still experience
    system hangs. I can't seem to make the problem happen, it only
    happens randomly. The past two times, an rsync has made the system crash.

    I'm using kernel 2.2.18 (tried 2.4 final briefly today to see if it
    would boot, it hung on bootup as well), with the latest
    ide.2.2.18.1221.patch from Andre's directory.

    The system in question is:

    Celeron 533 - 384 MB RAM - Asus P2B-F
    4 IDE Drives listed above:
    hde: Maxtor 91024U3, ATA DISK drive
    hdf: Maxtor 94098U8, ATA DISK drive
    hdg: QUANTUM FIREBALLP LM15, ATA DISK drive
    hdh: QUANTUM FIREBALLP LM30, ATA DISK drive
    1 IDE CDROM:
    hdc: NEC CD-ROM DRIVE:282, ATAPI CDROM drive
    Promise Ultra66 Controller, BIOS 2.0b18
    2 D-Link DFE-538 (RTL8139) adapters

    Any help, or any way I could help would be appreciated. Eager to try
    and get this resolved, as I've seen it crop up a number of times, and
    it's also a pain to have to physically hit the reset button as the
    machine is off-site.

    --
    Adrian
    -
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