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    SubjectRe: Another 2.2.5 crash, and it's not X, dammit!
    On Wed, Apr 14, 1999 at 05:35:37PM +0200, Markus Fischer wrote (in a private
    message - I hope he doesn't mind my quoting him in public):

    > Maybe you have an dma problem with one of you disks/cdrom ?
    > We know linux does not jet support all types of chipsets 100%.
    > I have some own my own which hangs the machine when i try to
    > mount a cdrom (dma enabled).

    This machine had two drives, one on each IDE controller. hda had DMA on
    after booting; on hdc, DMA was off, although I was able to turn it on once
    with no apparent ill effects. (It was off at the time of the crash.)

    A couple of days ago, I got these kernel messages:

    Apr 13 14:29:23 dreish kernel: hda: timeout waiting for DMA
    Apr 13 14:29:23 dreish kernel: hda: irq timeout: status=0xd0 { Busy }
    Apr 13 14:29:23 dreish kernel: hda: DMA disabled
    Apr 13 14:29:23 dreish kernel: ide0: reset: success
    Apr 13 14:29:33 dreish kernel: hda: irq timeout: status=0xd0 { Busy }
    Apr 13 14:29:33 dreish kernel: ide0: reset: success
    Apr 13 14:29:43 dreish kernel: hda: irq timeout: status=0xd0 { Busy }
    Apr 13 14:29:43 dreish kernel: end_request: I/O error, dev 03:02 (hda), sector 424106
    Apr 13 14:29:43 dreish kernel: hda: status timeout: status=0xd0 { Busy }
    Apr 13 14:29:43 dreish kernel: hda: drive not ready for command
    Apr 13 14:29:44 dreish kernel: ide0: reset: success
    Apr 13 14:29:54 dreish kernel: hda: irq timeout: status=0xd0 { Busy }
    Apr 13 14:29:54 dreish kernel: ide0: reset: success
    Apr 13 14:30:04 dreish kernel: hda: irq timeout: status=0xd0 { Busy }
    Apr 13 14:30:04 dreish kernel: end_request: I/O error, dev 03:02 (hda), sector 424108
    Apr 13 14:30:04 dreish kernel: hda: status timeout: status=0xd0 { Busy }
    Apr 13 14:30:04 dreish kernel: hda: drive not ready for command
    Apr 13 14:30:04 dreish kernel: ide0: reset: success
    Apr 13 14:30:14 dreish kernel: hda: irq timeout: status=0xd0 { Busy }
    Apr 13 14:30:14 dreish kernel: ide0: reset: success
    Apr 13 14:30:24 dreish kernel: hda: irq timeout: status=0xd0 { Busy }
    Apr 13 14:30:24 dreish kernel: end_request: I/O error, dev 03:02 (hda), sector 424110
    Apr 13 14:30:24 dreish kernel: hda: status timeout: status=0xd0 { Busy }
    Apr 13 14:30:24 dreish kernel: hda: drive not ready for command
    Apr 13 14:30:24 dreish kernel: ide0: reset: success

    At which point, I immediately shut down and replaced the drive, which was
    getting too small anyway. It was two years old, and had been running 24/7,
    so I guess this supports both the hardware failure theory and this DMA bug
    theory.

    Some information on the dearly departed disk:

    Apr 13 13:48:13 dreish kernel: hda: WDC AC22500L, ATA DISK drive
    Apr 13 13:48:13 dreish kernel: ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
    Apr 13 13:48:13 dreish kernel: hda: WDC AC22500L, 2441MB w/256kB Cache, CHS=620/128/63, DMA

    And I don't know how useful this is, but here's what /proc provides about
    the controller, ide0:

    # cat /proc/ide/ide0/config
    pci bus 00 device 39 vid 8086 did 7010 channel 0
    86 80 10 70 05 00 80 02 00 80 01 01 00 20 00 00
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    01 f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    77 e3 07 a3 09 00 00 00 00 00 00 00 00 00 00 00
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    00 00 00 00 00 00 00 00 10 0f 00 00 00 00 00 00
    # cat /proc/ide/ide0/channel
    0
    # cat /proc/ide/ide0/mate
    ide1
    # cat /proc/ide/ide0/model
    pci

    --
    Dan

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