iSeries I/O adapters and controllers 341Draft Document for Review October 18, 2004 5486IOA.fmPCI card placement rulesThere are two sets of rules that govern the placement of PCI cards in the iSeriesservers: Hard rules: Impose restrictions on the type of card, size, and valid slotplacement. Hard rules are taken into account by the IBM marketingconfigurator. Soft rules: Impose restrictions based on possible performance bottlenecksassociated with certain configuration and use. Soft rules depend on the use ofthe cards and required performance and, therefore, are not supported by themarketing configurator and must be taken into account separately.The placement of PCI cards follows special rules. For a complete explanation ofboth hard and soft rules, as well the types of cards and slots supported on eachsystem, refer to PCI Card Placement Rules for the IBM Eserver iSeries ServerVersion 5 Release 2, REDP-3638, before you propose any configuration. Rulesare also explained in the iSeries Information Center at:http://publib.boulder.ibm.com/infocenter/eserver/v1r2s/en_US/index.htm?info/iphak/howtodecide.htmPCI IOPThere are several types of I/O processor controller cards: Integrated IOPs: These are integrated on the backplane of a system ortower. PCI IOP controller cards: These cards support a number of low-speed PCIcard slots and a number of high-speed PCI card slots depending on how thebackplane is wired. They require a controller position on the backplane.Thenew #481x Integrated xSeries Server also require an IOP. Integrated xSeries Server IOP: This is a special case of a PCI IOP controllercard. It drives a select subset of supported PCI IOA cards.In the Model 250, the Integrated xSeries Server IOP requires two specializedslots (a processor slot and bridge slot) and a PCI IOP. In Models 270, 800,810, 820, 825, 830, 840, 870, and 890, the Integrated xSeries Server IOPoccupies a valid IOP slot in the system. An additional IOP card is not requireon older feature cards but the new #481x Integrated xSeries Server doesrequire an IOP.Supported in Model 520, 550, 570, and 595 expansion towers only. The 520,550, 570 system units support the newer #481x Integrated xSeries Serverwhich is small and fits in the CEC however it requires a dedicated IOP to drivethe card.
