196 IBM ^ zSeries 990 Technical Guide
The additional channels installed concurrently to the hardware can also be concurrently
activated to an operating system using the Dynamic I/O configuration function. Dynamic I/O
configuration can be used by the z/OS, OS/390, or z/VM operating systems. Linux and CFCC
not provide Dynamic I/O configuration support.
To better exploit the CUoD for I/O capability, an initial configuration should be carefully
planned to allow concurrent upgrades up to a target configuration. Plan Ahead concurrent
conditioning process can include, in the initial configuration, the shipment of additional I/O
cages required for future I/O upgrades.
Plan Ahead concurrent conditioning
Concurrent Conditioning (FC 1999) and Control for Plan Ahead (FC 1995) features, together
with the input of a future target configuration, allow upgrades to exploit the zSeries 990’s
order process configurator for concurrent I/O upgrades at some future time.
The Plan Ahead feature identifies the content of the target configuration, which cannot be
concurrently installed, avoiding any down time associated with feature installation. As a
result, Concurrent Conditioning may include, in the initial order, additional I/O cages to
support the future I/O requirements.
Accurate planning and definition of the target configuration is vital in maximizing the value of
this feature.
8.3 Customer Initiated Upgrade (CIU)
Customer Initiated Upgrade (CIU) is the capability for the z990 user to initiate a permanent
upgrade for CPs, ICFs, IFLs, zAAPs, and/or memory via the Web, using IBM Resource Link.
CIU is similar to CUoD, but the capacity growth can be added by the customer. The customer
also has the ability to unassign previously purchased CPs and IFLs processors via CIU.
CIU requires the CIU Enablement feature (FC 9898) installed.
The customer will then be able to download and apply the upgrade using functions on the
HMC via the Remote Support Facility, without requiring the assistance of IBM service
personnel. Once all the prerequisites are in place, the whole process from ordering to
activation of the upgrade is performed by the customer. The actual upgrade process is fully
automated and does not require any onsite presence of IBM service personnel.
CIU supports LIC-CC upgrades only and does not support I/O upgrades. All additional
capacity required by a CIU upgrade must be previously installed. This means that additional
books and/or I/O cards cannot be installed via CIU. The sum of CPs, unassigned CPs, IFLs,
unassigned IFLs, ICFs, and zAAPs cannot exceed eight PUs per book. The number of zAAPs
cannot exceed four zAAPs per book. The total number of zAAPs cannot exceed the number
of CPs plus unassigned CPs on a z990 server.
CIU may change the server’s
software model (3xx) if additional CPs are requested, but it
cannot change the z990
server model (2084-xxx).
Important: CIU for processors cannot be completed when CBU or On/Off CoD is activated
on a z990 server. In this case, the CIU for processors can be ordered and retrieved by the
customer, but
cannot be applied until the temporary capacity upgrade via CBU or On/Off
CoD is deactivated.

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