Chapter 2. Hardware architecture 47 Powering down all the system enclosures on critical power faults. Verifying power configuration. Reporting power and environmental faults, as well as faults in the RASinfrastructure network itself, on operator panels and through the serviceprocessor. Assigning and writing location information into various VPD elements in thesystem.The power and RAS infrastructure monitors power, fans, and thermal conditionsin the system for problem conditions. These conditions are reported eitherthrough an interrupt mechanism (for critical faults requiring immediate operatingsystem action) or through messages passed from the RAS infrastructure to theservice processor to Run-Time Abstraction Service (RTAS).2.7.8 Supported I/O adapters in p5-595 and p5-590 systemsThe following are configuration rules for the I/O drawer.I/O Drawer (5791/5794) adapters placement (p5-590 and p5-595 only)The FC 5791 drawer provides 20 blind-swap hot-plug PCI-X slots and 4integrated DASD backplanes that support up to 16 hot-swappable disk bays. TheFC 5794 drawer is the same as FC 5791 but supports only two integrated DASDbackplanes that support up to eight hot-swappable disk bays. The 20 PCI-X slotsare divided into six PCI Host Bridges (PHB) as follows: PHB1 = slots 1, 2, 3, 4 PHB2 = slots 5,6,7; Z1 onboard PHB3 = slots 8,9,10, Z2 onboard PHB4 = slots 11, 12, 13, 14 PHB5 = slots 15, 16, 17, Z1 onboard PHB6 = slots 18, 19, 20, Z2 onboardFigure 2-16 and Figure 2-17 show how to find more information about PCIadapter placement in IBM Sserver Hardware Information Center by placing asearch for PCI placement.http://publib.boulder.ibm.com/infocenter/eserver/v1r2s/en_US/index.htmNote: It is the cabling between the RIO-2 drawer and the BPA that defines thenumbering of the I/O drawer not the physical location of the drawer.
