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

Jens Axboe
2003-11-06T13:33:27Z

On Thu, Nov 06 2003, Prakash K. Cheemplavam wrote:
> Jens Axboe wrote:
> >On Fri, Nov 07 2003, Nick Piggin wrote:
> >
> >>
> >>Jens Axboe wrote:
> >>
> >>
> >>>On Fri, Nov 07 2003, Nick Piggin wrote:
> >>>
> >>>
> >>>>Jens Axboe wrote:
> >>>>
> >>>>
> >>>>
> >>>>>sys time is usually pretty high if that is the case, and it's hovering
> >>>>>around 5% here... Prakash, are you sure that dma is enabled on the
> >>>>>drive? When you see the problem, do a vmstat 1 for 10 seconds so you
> >>>>>are
> >>>>>absolutely sure you are sending the info from when the problem occurs.
> >>>>>
> >>>>>
> >>>>
> >>>>Although have a look at the interrupts field in vmstat 1255, 725, 736
> >>>>...
> >>>>
> >>>
> >>>Yeah that is pretty high for just doing a burn, maybe something else is
> >>>
> >>
> >>;) you are forgetting 2.6 should give 1000 timer interrupts per second!
> >
> >
> >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

> Is it normal that SCSI subsystem gets init'ed, even though nothing of it
> is activated in the kernel?

No, you still have it left in your kernel options.

--
Jens Axboe