On Thu, Mar 16, 2006 at 09:11:01PM -0600, Peter Eisch wrote:
> On 3/16/06 3:48 PM, "Thor Lancelot Simon" <tls@rek.tjls.com> wrote:
> 
> > On Thu, Mar 16, 2006 at 03:28:17PM -0600, Peter Eisch wrote:
> > 
> >> ppb0 at pci1 dev 2 function 0: Intel i960 RM PCI-PCI (rev. 0x02)
> >> pci2 at ppb0 bus 5
> >> pci2: i/o space, memory space enabled, rd/line, wr/inv ok
> >> ahc1 at pci2 dev 4 function 0: Adaptec aic7899 Ultra160 SCSI adapter
> >> ahc1: interrupting at irq 5
> >> ahc1: aic7899: Ultra160 Wide Channel A, SCSI Id=7, 32/253 SCBs
> >> scsibus0 at ahc1: 16 targets, 8 luns per target
> >> ahc2 at pci2 dev 4 function 1: Adaptec aic7899 Ultra160 SCSI adapter
> >> ahc2: interrupting at irq 11
> >> ahc2: aic7899: Ultra160 Wide Channel B, SCSI Id=7, 32/253 SCBs
> >> scsibus1 at ahc2: 16 targets, 8 luns per target
> > 
> > What card is this?  This looks *very* wrong.  That "i960 RM PCI-PCI"
> > is not really a bus bridge, it's a CPU, generally used on RAID adapters,
> > that has an integral PCI bridge.  This looks like a RAID card whose
> > BIOS has failed to run for some reason, leaving it uninitialized.
> > 
> 
> This is a Dell 2550 with dual 1.13MHz PIIIs, the PERC 3/DC RAID controller.

Let me try again.  I don't know anything about the Dell system in question,
nor which cards you have installed in it, but I am curious about just how,
exactly, those Adaptec SCSI chips happen to show up _behind a bus bridge
that is usually part of a RAID controller_, when a RAID controller that
I *know* uses that same CPU/bridge is *also* probed and attached.

How, *exactly*, does the PERC3/DC talk to its disks?  I am guessing that
it is through those Adaptec SCSI channels.  No?

Thor