Re: problem with a cobalt RaQ550 system and DMA (Serverworks OSB4 in impossible state)

From: Olivier Bornet (Olivier.Bornet@puck.ch)
Date: Wed Apr 23 2003 - 18:29:09 EST

Hi Alan,

On Wed, Apr 23, 2003 at 11:21:10PM +0100, Alan Cox wrote:
> On Mer, 2003-04-23 at 22:27, Olivier Bornet wrote:
> > I'm trying to install Debian on 4 RaQ550 with each 2 80GB disks. All
> > seems OK with 3 of RaQ, but with one, it crash when I put the two disks
> > in a RAID1 meta device. In fact, it as crash at about 6% before the 70GB
> > partition is fully synchronized.
>
>
> Bad block I think. Its a bug fixed in 2.4.21pre. It trips a sanity
> check for an OSB4 bug inadvertantly. 2.4.21pre handles CSB5 with full
> UDMA and OSB4 in MWDMA2 without tripping wrongly.
>
> If your chipset is CSB5 you can also just comment out the check and
> rebuild

At this time, I have compiled and installed a 2.4.20-ac2 + some cobalt
patches. Is the bug also fixed in 2.4.20-ac2, or must I rebuild the
2.4.20 with the check commented out ?

(currently, the sync of the partition is in the way with the ac2
kernel... just started... need about 100 minutes to finish...).

I will comment out the check tomorrow if this is needed.

Thanks for your help, and keep up the good work.

                Olivier 

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