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

From: Nick Piggin
Date: Thu Nov 06 2003 - 08:55:53 EST

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


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

* 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

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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