Re: Promise PDC20269 (Ultra133 TX2) + Software RAID

[Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz _at_ xxxxxxxxxxxxxx>]

On Wednesday 04 of February 2004 22:22, Andreas Steinmetz wrote:
> Pedro Larroy wrote:
> > On Tue, Feb 03, 2004 at 02:08:31PM +1030, Ryan Verner wrote:
> >>And the machine is randomly locking up, and of course, on reboot, the
> >>raid array is rebuilt.  Ouch.  Any clues as to why?  I'm sure the hard
> >>drive hasn't failed as it's brand new; I suspect a chipset
> >>compatibility problem or something.
> >>
> >>R
> >
> > I have similar issues with 20269. I have two cards on one box doing sw
> > raid5 on 6 ide drives. It only runs stably with 2.4.19
> > It has been many months since I assembled that box, and I've tried
> > kernels from 2.4.20-ac, 2.5.x, 2.6.2  and all hang after some time
> > running.
> >
> > I remember that pdcs also hanged a dual processor box.
>
> In my case (see my mail to lkml today) I do suspect concurrent disk
> access and IO-APIC to be the culprit. If you're using an IO-APIC try
> booting with either "noapic" or "hdx=serialize" where hdx is one of the
> disks of your controller card.

Try "noapic" first, "hdx=serialize" will kill you RAID performance.

---bart

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