Visara SCON-20L Installation - Manual (Page 73)

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Chapter 6. IOCDS Sample
Definitions
Following are some example IOCDS definitions. Detailed examples of the corresponding
HCD panels are not practical, due to the large number of panels required to create one
of these definitions. Refer to the sample HCD panels in Chapter 5, and to the parameter
cross reference chart in Chapter 2, to aid in determining what to define in the HCD
panels.
Here are some of the key parameters used in the definitions for the SCON, and what
their purpose are.
CHPID
• PATH=number identifies which host ESCON connection is used
• TYPE=CNC required for ESCON
• SWITCH=number identifies an ESCON Director as being in the channel path
CNTLUNIT -
• LINK=number identifies the ESCON Director port that the controller is attached to
• PATH argument allows association of the PATH to the LINK
IODEVICE - Basically the same as for Bus and Tag
• PARTITION identifies which partition the definition is assigned to. Note that if no
PARTITION parameter is specified, then the IODEVICE statement applies to all
partitions sharing the CHPID (and the CNTLUNIT macro also applies to each).
When this is the situation, the single set of statements is actually defining a CU in
each of the LPARs with identical addressing. The SCON in turn, must have a separate
CU defined to each of the LPARS sharing the path. Channel Path Filtering must be
used to allow duplicate CUADD values to be used on the same path, and to distinguish
which definition is to be used for each LPAR