Re: DMA and my Maxtor drive

From: Dennis (dennis@etinc.com)
Date: Sat Oct 21 2000 - 13:02:07 EDT

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    At 06:43 PM 10/20/2000, linux@cr753963-a.glph1.on.wave.home.com wrote:

    >I get this when DMA is enabled:
    >
    >Oct 20 15:39:07 cr753963-a kernel: hdb: timeout waiting for DMA
    >Oct 20 15:39:07 cr753963-a kernel: hdb: irq timeout: status=0x6e {
    >DriveReady DeviceFault DataRequest CorrectedError Index }
    >ide0: reset: success
    >Oct 20 15:39:07 cr753963-a kernel: hdb: DMA disabled
    >Oct 20 15:39:07 cr753963-a kernel: ide0: reset: success
    >
    >It only happens when there lots of data is being transferred, or compiled
    >on the drive.. The drive status is this:
    >
    >/dev/hdb:
    >
    > Model=Maxtor 82560A4, FwRev=AA8Z2726, SerialNo=C40LTQGA
    > Config={ Fixed }
    > RawCHS=4962/16/63, TrkSize=0, SectSize=0, ECCbytes=20
    > BuffType=DualPortCache, BuffSize=256kB, MaxMultSect=16, MultSect=off
    > CurCHS=4962/16/63, CurSects=5001696, LBA=yes, LBAsects=5001728
    > IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
    > PIO modes: pio0 pio1 pio2 pio3 pio4
    > DMA modes: mdma0 mdma1 *mdma2

    The same thing happens with big Seagates. It is linux specific. its been a
    problem for a long time.

    the problem doesnt occur with Western Digital drives, whatever it is.

    DB
    Emerging Technologies, Inc.
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