Re: 2.9test9-mm1 and DAO ATAPI cd-burning corrupt

[Nick Piggin]

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).


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