The HyperTrap

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Today

I have recently described how to setup a split PCI configuration with LDoms on a Sun Fire T2000. But I have just discovered (thanks to my co-worker Jochen Behrens) that the device layout is different on the different version of the Sun Fire T2000:

On the older version of the Sun Fire T2000, the internal disks and DVD-ROM are connected to a disk controller card in one of the PCI-X slots, so they are on bus pci@7c0 (bus_b). This is the configuration I have previously described.
On the newer versions of the Sun Fire T2000, we now have an on-board disk controller which is on bus pci@780 (bus_a). The internal disks are connected to that on-board controller so they are now on bus pci pci@780 (bus_a), but the DVD-ROM is still on bus pci@7c0 (bus_b). So for these versions of the Sun Fire T2000, we have this layout:
- Devices connected to pci@780 (bus_a)
- Devices connected to pci@7c0 (bus_b)
So if you want to setup a split PCI configuration on this newer Sun Fire T2000 you have to add either a Fiber Channel or a SCSI host adapter in one of the PCI-E or PCI-X slots on bus pci@7c0 (bus_b) like this: