Abstract for HCD Planning
z/OS Version 2 Release 1 summary of changes
Introduction
What an I/O configuration is
I/O configuration definition process
Defining an I/O configuration to the software
Hardware Configuration Definition (HCD)
Input/output definition file (IODF)
Unit information module (UIM)
Unit control block (UCB)
Eligible device table (EDT)
Defining an I/O configuration to the hardware
I/O configuration program (IOCP)
Input/output configuration data set (IOCDS)
Hardware system area (HSA)
Ensuring that the software and hardware definitions match
Changing hardware and software I/O configuration definitions
Making both hardware and software dynamic changes
Making software-only dynamic changes
Using HCM for I/O definition
Planning your I/O configuration definition
Components of an I/O configuration
Logical partitions
Logical control units for I/O devices
Channel path numbering
Selection of the path to access an I/O device
Making decisions about your configuration
IBM zSeries and System z platform considerations
z890 and z990 processor support by release and LIC level
Defining operating system data
Defining switch data
Defining processor, logical channel subsystem, partitions, channel path data, and subchannel sets
Defining multiple subchannel sets
Defining control unit data
Defining I/O device data
Deciding about JES3 initialization stream checker data
Understanding a sysplex configuration
Defining coupling facility components in a sysplex
Defining Server Time Protocol (STP) links in a sysplex
Defining InfiniBand connections in a sysplex
Reconfiguration of coupling facility receiver CHPIDs
Restrictions
Reconfiguring coupling facility peer CHPIDs
Managing IOCDSs and IPL attributes across a sysplex
Using automatic tape switching
Preparing for automatic tape switching
Deciding how to use automatically switchable devices
Operational considerations for automatic tape switching
Defining shared channel paths
Considerations for sharing channel paths
Defining logical partition access to a channel path
Processors communicating through shared ESCON or FICON channel paths
Using ESCON CTC connections
Using FICON CTC connections
Defining dynamically managed channel paths
Defining spanned channel paths
Considerations for spanning channel paths
Creating over-defined channel paths
FICON channels
Channel path definitions
Dynamic activation
Migrating to FICON channels
Migrating from CNC to FCV channel paths
Migration from CNC or FCV to FC channel paths on the control unit
Open Systems Adapter Channels
Defining special devices and special secondary devices
Defining a special device (3390S)
Defining a special secondary device (3390D)
Defining IQD CHPIDs and device types
Specifying an I/O device number
Replicating I/O device numbers
I/O device numbers for multiple exposure devices
I/O device numbers for a parallel access volume
Deleting parallel access volume alias devices dynamically
Workload manager and dynamic alias management
Specifying I/O device parameters and features
Defining whether an I/O device will be dynamic
Device support for dynamic configuration
Redefining the dynamic parameter for an I/O device
Defining a tape device as automatically switchable
Defining the location of an I/O device's unit control block (UCB)
Deciding whether to define above 16 megabyte UCBs
Case 1
Case 2
Case 3
Case 4
Case 5
Defining an above 16 megabyte UCB
Defining allocation preferences
Understanding I/O device allocation in z/OS
Indicating a specific device for allocation
Specifying a generic device type for allocation
Specifying an esoteric device group for allocation
Required esoteric device groups
Specifying order in an esoteric with the device preference table
Advantages of specifying an esoteric device group
Holding or releasing resources while a job waits
Device preference table's effect on UNIT=AFF request
Defining device allocation in HCD
Defining esoteric device groups in an EDT using HCD
Changing the device preference table order
Defining devices as virtual I/O (VIO) eligible
EDTs for dynamic configuration
Primary and secondary EDTs
Migrating to subchannel sets
Scenario: All LPARs are z/OS V1R7 or later
Scenario: Some LPARs are pre-z/OS V1R7
Example of migrating devices between subchannel sets
Device number alignment
Numbering schemes
Compacting or rolling reuse of addresses
Pairing addresses
Filling the device number ranges
Using HCD to move alias devices into a different subchannel set and closing the gaps in the device number range
Specifying an I/O configuration at IPL
Defining your initial I/O configuration
IODF processing at IPL
IODF statement in the LOADxx member
Search order for the LOADxx member and IODF
Specifying the IODF high-level qualifier
Specifying the IODF suffix
Specifying an operating system configuration ID
Specifying the EDT identifier
Using your initial I/O configuration with special secondary (3390D) devices for reIPL
Defining your I/O configuration for reIPL
Dynamically changing an I/O configuration
Actions to change your configuration dynamically
Dynamically changing an I/O configuration in LPAR mode
Dynamic I/O configuration considerations
Ensuring that you activate the correct IODF in step 1
Dynamic deletion of I/O hardware components requires FORCE
Dynamic deletion of I/O and coupling facility hardware components
Dynamic activation in a sysplex that includes a uniprocessor
Example of deleting an I/O device in LPAR mode
Dynamically adding and removing logical partitions to the I/O configuration
Dynamically changing an I/O configuration in a sysplex
Dynamically changing component definitions
Making dynamic changes to I/O devices
Dynamically adding I/O devices
Dynamically deleting I/O devices
Dynamically changing I/O devices
Limitations on dynamic changes to I/O devices
Console devices
Considerations for z/OS installed products
Making dynamic changes to channel paths
Dynamically adding channel paths
Dynamically deleting channel paths
Dynamically changing channel paths
Making dynamic changes to control units
Dynamically adding control units
Dynamically deleting control units
Dynamically changing control units
Making changes to coupling facility devices and control units
Making the first channel path connection for a coupling facility
Making subsequent channel path connections for a coupling facility
Breaking a channel path connection that is not the last connection to a coupling facility
Breaking the last channel path connection to a coupling facility
Dynamic I/O configuration in a multiple LCSS environment
Testing dynamic activation
Recovery during dynamic configuration
Recovering dynamic configuration changes
Recovering original I/O configuration without reIPL
Continuing I/O configuration changes without reIPL
Recovering original I/O configuration with reIPL
Continuing I/O configuration changes with reIPL
Recovering LPAR mode dynamic configuration changes
Recovering original LPAR mode I/O configuration without system reset
Continuing LPAR mode I/O configuration changes without system reset
Recovering original LPAR mode I/O configuration with system reset
Continuing LPAR mode I/O configuration changes with system reset
Using HCM to migrate to IBM zSeries z890 or z990
Configurations with logical definitions only
Configurations including physical definitions
Migrating to the dynamic capability provided with HCD
UCB services considerations
Converting references to UCB services for dynamic
Consideration when accessing UCB data
Services accepting a UCB copy
Specifying devices as dynamic after a migration
Trademarks