5486m890.fm Draft Document for Review October 18, 2004256 IBM Eserver i5 and iSeries System HandbookExternal towersMigration towers are not supported on the Model 890. PCI towers are supportedwith upgrades for migration only.Refer to Chapter 15, “Towers, racks, and high-speed link” on page 259, forinformation about supported towers for the Model 890, and “Summary of theiSeries expansion units and towers” on page 105 for a table of configurationmaximums.Model 890 upgradesSee Chapter 16, “Upgrades to iSeries servers” on page 307, for general upgradeconsiderations and server-to-server upgrade possibilities. Supported modelupgrades for the Model 890 are identified in IBM Eserver iSeries SupportedUpgrades, REDP-0322.On Demand featuresThe IBM eServer iSeries 890 offers several Capacity on Demand options thatmake it possible to activate additional processor resource. Capacity Upgrade onDemand, On/Off Capacity on Demand, Reserve Capacity on Demand, and TrialCapacity on Demand are currently available. The following table summarizes thedifferent On Demand offerings and the features used. Base features are shadedgray.Note: The placement of PCI cards follows special rules. Refer to “PCI cardtechnology” on page 340 and PCI Card Placement Rules for the IBMEserver iSeries Server Version 5 Release 2, REDP-3638, before youpropose any configuration.
