RAID5 problem with multiple Promise PDC20269 controllers

This is probably more of a hardware question than RAID but since there has to be somebody in the same boat as myself....

I'm trying to do a RAID5 setup with 3 IDE disks connected to IDE1/IDE2 on a Promise ULTRA133 TX2. Fine..works great with only two disks. So I bring in my 3rd disk on the second PDC20269 and I get kernel lockups and fun stuff when the array tries to rebuild or activate. I've tried deja and there seems to be some issues with multiple cards but I can't seem to find any resolutions. This is a RH 8.0 box using 2.4.18.

Thanks for any help!
Chris

Broken promises don't upset me. I just think, why did they believe me?

strange ...

I'm running 20269's (or was that 68's?) with four drives each, and it works fine

Roy Sigurd Karlsbakk, Datavaktmester
ProntoTV AS - http://www.pronto.tv/
Tel: +47 9801 3356

Computers are like air conditioners.
They stop working when you open Windows.

I've had problems with using two PDC20269's at the same time too. (well actually one is a 69, the other is the 100, not 133 version).

They seem to work ok without DMA on, but otherwise I get lots of dma errors when heavy load is placed (such as re-syncing).

I've got an Epox motherboard (Duron 1.0 ghz), and four IBM 7200RPM 120gig harddrives.

Right now things are running "ok" by having all four drives on one card and the other card (doesn't matter which) in my desk drawer. But it would be nice if I could put it back in the system (the speed was -great-!).

-Gryn