I/O Configuration Management; Channel Subsystem Summary - IBM z13s Technical Manual

5.2 I/O configuration management

The following tools are available to help maintain and optimize the I/O configuration:
IBM Configurator for e-business (eConfig): The eConfig tool is available from your IBM
representative. It is used to create configurations or upgrades of an existing configuration,
and it maintains tracking to the installed features of those configurations. eConfig
produces helpful reports for understanding the changes that are being made for a new
system or a system upgrade, and what the target configuration will look like.
Hardware configuration definition (HCD): HCD supplies an interactive dialog to generate
the IODF, and later the IOCDS. Generally, use HCD or Hardware Configuration Manager
(HCM) to generate the I/O configuration rather than writing IOCP statements. The
validation checking that HCD runs against a IODF source file helps minimize the risk of
errors before an I/O configuration is activated. HCD support for multiple channel
subsystems is available with z/VM and z/OS. HCD provides the capability to make both
dynamic hardware and software I/O configuration changes.
Note: Certain functions might require specific levels of an operating system, PTFs,
or both.
Consult the appropriate 2965DEVICE, 2964DEVICE, 2828DEVICE, 2827DEVICE,
2818DEVICE, and 2817DEVICE Preventive Service Planning (PSP) buckets before
implementation.
Hardware Configuration Manager (HCM): HCM is a priced optional feature that supplies a
graphical interface for HCD. It is installed on a PC and allows you to manage both the
physical and the logical aspects of a mainframe's hardware configuration.
CHPID Mapping Tool (CMT): The CMT helps to map CHPIDs onto PCHIDs base on a
IODF source file and the eConfig configuration file of a mainframe. It provides CHPID to
PCHID mapping with high availability for the target I/O configuration. Built-in mechanisms
generate a mapping according to customized I/O performance groups. Additional
enhancements are implemented in CMT to support the z13 and z13s servers. The CMT is
available for download from the IBM Resource Link website:
http://www.ibm.com/servers/resourcelink

5.3 Channel subsystem summary

z13s servers support the channel subsystem features of multiple LCSS, multiple SS, and the
channel spanning described in this chapter. Table 5-1 lists an overview of z13s channel
subsystem with maximum values of different specs.
Table 5-1 z13s CSS overview
Maximum number of CSSs
Maximum number of LPARs per CSS
Maximum number of LPARs per system
Maximum number of subchannel sets per CSS
196
IBM z13s Technical Guide
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CSS0 - CSS1: 15
CSS2: 10
40
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