Visara FEP-4600 Planning Guide - Manual (Page 44)

Chapter 3. Support of PU 2.1 Nodes
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Creating Host Definitions
Local Major Node IOCDS Gen Requirements
Remember, this method can only be applied to the older Luminex ESCON card and does
not apply to FICON or the newer BARR ESCON card.
Each PU 2.1 DSPU that is to be supported by the FEP-4600 requires that a single
subchannel address be assigned, to the host LPAR that is responsible for communicating
with the resource. If the same LPAR must communicate with multiple PU2.1 resources,
then a single CNTLUNIT macro may be used to define the multiple PU 2.1 resources, by
configuring a consecutive range of subchannel addresses. This conserves CU resources in
the FEP-4600. An example set of definitions for a single DSPU (type 2.1) would look
similar to the following:
RESOURCE PARTITION=((PROD1,1),(TEST,3))
CHPID PATH=(1F),TYPE=CNC,SWITCH=01,SHARED
CNTLUNIT CUNUMBR=1F00,PATH=1F,UNITADD=((00,1)),UNIT=3174,LINK=C5
IODEVICE CUNUMBR=1F00,ADDRESS=(680,1)UNIT=3174,UNITADD=00,PARTITION=(PROD1)
On a processor that supports Logical Subsystems (such as the z990), the definitions will
look slightly different. Here is the same set of definitions as would be seen for the z990.
RESOURCE PARTITION=(CSS(0),(PROD1,1),(TEST,3))
CHPID PATH=(CSS(0),1F),TYPE=CNC,SWITCH=01,SHARED,PCHID=150
CNTLUNIT CUNUMBR=1F00,PATH=(CSS(0),1F),UNITADD=((00,1)),UNIT=3174,LINK=(CSS(0),C5)
IODEVICE CUNUMBR=1F00,ADDRESS=(680,1)UNIT=3174,UNITADD=00,PARTITION=(CSS(0),PROD1)
A similar definition that supports 2 DSPU (type 2.1) controllers over separate links
controlled by the same LPAR might appear like this:
RESOURCE PARTITION=((PROD1,1),(TEST,3))
CHPID PATH=(1F),TYPE=CNC,SWITCH=01,SHARED
CNTLUNIT CUNUMBR=1F20,PATH=1F,UNITADD=((00,2)),UNIT=3174,LINK=C5
IODEVICE CUNUMBR=1F20,ADDRESS=(680,2)UNIT=3174,UNITADD=00,PARTITION=(PROD1)
Note that when sharing a single CNTLUNIT macro for multiple PU2.1 platforms, you are
defining a consecutive range of addresses.