Capacity Backup - IBM z13s Technical Manual

Model MSU Model
cap ID cap ID
Y01 162 Z01
Y02 304 Z02
Y03 439 Z03
Y04 567 Z04
Y05 690 Z05
Y06 806 Z06
A00: Model capacity identifier A00 is used for IFL-only or ICF-only configurations.

2.7.5 Capacity BackUp

The Capacity BackUp (CBU) feature delivers temporary backup capacity in addition to what
an installation might have already installed in numbers of assigned CPs, IFLs, ICFs, zIIPs,
and optional SAPs.
The following CBU types are available:
CBU for CP
CBU for IFL
CBU for ICF
CBU for zIIP
Optional SAPs
When CBU for CP is added within the same capacity setting range (indicated by the model
capacity indicator) as the currently assigned PUs, the total number of active PUs (the sum of
all assigned CPs, IFLs, ICFs, zIIPs, and optional SAPs) plus the number of CBUs cannot
exceed the total number of PUs available in the system.
When CBU for CP capacity is acquired by switching from one capacity setting to another, no
more CBU can be requested than the total number of PUs available for that capacity setting.
CBU and granular capacity
When CBU for CP is ordered, it replaces lost capacity for disaster recovery. Specialty engines
(ICFs, IFLs, and zIIPs) always run at full capacity, and also when running as CBU to replace
lost capacity for disaster recovery.
When you order CBU, specify the maximum number of CPs, ICFs, IFLs, zIIPs, and SAPs to
be activated for disaster recovery. If disaster strikes, you decide how many of each of the
contracted CBUs of each type must be activated. The CBU rights are registered in one or
more records on the server. Up to eight records can be active, which can contain several CBU
activation variations that apply to the installation.
You can test the CBU. The number of CBU test activations available for no additional fee in
each CBU record is determined by the number of years that are purchased with the CBU
record. For example, a 3-year CBU record has three test activations, and a 1-year CBU
record has one test activation. You can increase the number of tests up to a maximum of 15
for each CBU record.
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IBM z13s Technical Guide
MSU Model MSU
cap ID
178
333
481
622
756
884
Model MSU Model
cap ID cap ID
MSU Model MSU
cap ID