External Towers; Model 550 Upgrades; On Demand Features - IBM eserver i5 Handbook

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and on the number of PCI slots. PCI card placement rules and LPAR
configuration considerations also affect the number of slots that are supported.
See the table on page 84 for the number of maximum features supported by the
total system and in the Model 550 system unit. See Chapter 17, "iSeries I/O
processors" on page 319, and Chapter 18, "iSeries I/O adapters and controllers"
on page 339, for full descriptions of the features that are supported. See "Not all
features are supported on all models. Some features may be withdrawn but are
in the table for reference. AIX specific adapters are not described in this book." on
page 344 for supported Linux Direct Attach features.
Note: The placement of PCI cards follows special rules. Refer to "PCI card
technology" on page 340 and PCI Card Placement Rules for the IBM
Eserver iSeries Server Version 5 Release 2, REDP-3638, before you
propose any configuration.

External towers

Migration towers are not supported on the Model 550. PCI towers are supported
with upgrades for migration only.
Refer to Chapter 15, "Towers, racks, and high-speed link" on page 259, for
information about supported towers for the Model 550, and "Summary of the
iSeries expansion units and towers" on page 105 for a table of configuration
maximums.

Model 550 upgrades

See Chapter 16, "Upgrades to iSeries servers" on page 307, for general upgrade
considerations and server-to-server upgrade possibilities. Supported model
upgrades for the Model 550 are identified in IBM Eserver iSeries Supported
Upgrades, REDP-0322.

On Demand features

Every IBM eServer i5 550 offers several Capacity on Demand options that make
it possible to activate additional processor resource. Capacity Upgrade on
Demand, On/Off Capacity on Demand, Reserve Capacity on Demand, and Trial
Capacity on Demand are currently available.
Capacity upgrade on Demand (Permanent)
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Draft Document for Review October 18, 2004