Re: Unable to install with MPT SCSI Controller and > 2GB memory

[Brian Long <brilong cisco com>]

Jussi Silvennoinen wrote:

> > I already posted a bugzilla on this, just curious if this rings any bells...
> >
> > I have an Abit KN8-SLI motherboard and an Athlon 64 X2 dual core 4600+ 
> > processor.  When it "only" had 2GB memory on board, I could install and 
> > work with RHEL 4 U2 and U3 no problem.
> >
> > When I upgraded to 4GB memory, I ran into a problem where it says 
> > "/Kernel panic - not syncing: PCI-DMA: high address but no IOMMU."  /I 
> > got around that by passing iommu=soft to the kernel, but then I get 
> > "mptbase: Initiating ioc0 recovery" over and over again.
> >
> > Seems that the MPT SCSI driver is not happy with > 2GB memory?  Does 
> > this sound familiar to anyone?
> >    
>
> Make sure your bios is up-to-date, dualcore-bioses have been notoriously 
> buggy. Are you doing x86-64 or i386? I got several Xeon's running i386 and 
> x86-64 rhel4-u2 with 4gb using MPT, all in IM-mode.
>  
I also have Sun V20z's and V40z's with MPT SCSI controllers running 
anywhere from 4GB to 16GB with no issues.

/Brian/