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    SubjectRe: 2.9test9-mm1 and DAO ATAPI cd-burning corrupt
    On Fri, Nov 07 2003, Nick Piggin wrote:
    >
    >
    > Jens Axboe wrote:
    >
    > >On Thu, Nov 06 2003, Prakash K. Cheemplavam wrote:
    > >
    > >>>>>Heh indeed, maybe because the archs I use are still at 100. Looks
    > >>>>>suspiciously like it's loosing timer interrupts, which would indeed
    > >>>>>point to PIO.
    > >>>>>
    > >>>>>
    > >>>>bash-2.05b# hdparm -I /dev/hdc
    > >>>>
    > >>>
    > >>>-i please
    > >>>
    > >>bash-2.05b# hdparm -i /dev/hdc
    > >>
    > >>/dev/hdc:
    > >>
    > >>Model=LITE-ON LTR-16102B, FwRev=OS0K, SerialNo=
    > >>Config={ Fixed Removeable DTR<=5Mbs DTR>10Mbs nonMagnetic }
    > >>RawCHS=0/0/0, TrkSize=0, SectSize=0, ECCbytes=0
    > >>BuffType=unknown, BuffSize=0kB, MaxMultSect=0
    > >>(maybe): CurCHS=0/0/0, CurSects=0, LBA=yes, LBAsects=0
    > >>IORDY=yes, tPIO={min:227,w/IORDY:120}, tDMA={min:120,rec:120}
    > >>PIO modes: pio0 pio1 pio2 pio3 pio4
    > >>DMA modes: mdma0 mdma1 *mdma2
    > >>AdvancedPM=no
    > >>
    > >>* signifies the current active mode
    > >>
    > >>The same: dma is active.
    > >>
    > >
    > >Indeed, so you are ysing multiword mode 2. Can you try and do a dd from
    > >the drive, while doing a vmstat 1? Also, does that show the jerky
    > >behaviour?
    > >
    >
    > AFAIK, Prakash cannot reproduce this bad behaviour with mm1, only mm2 (is
    > this right, Prakash?). So its something there (don't forget Andrew merges
    > the latest bk with his releases too).

    I'm not aware of anything in that area that could explain the change.

    --
    Jens Axboe

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