Visara CCA-3074 Planning Guide - Manual (Page 16)

Chapter 2. Planning for Your Installation
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Worksheet Discussion
Number of Mainframes: If more than one mainframe must be
supported by the CCA-3074 then it is best to connect through
ESCON/FICON Directors. If no ESCON/FICON Directors are
available the CCA-3074 must have at least one cable connection
to each mainframe. A maximum of two mainframes can be
supported through ESCON when Directors are not used. A
maximum of four mainframes can be supported through FICON
when Directors are not used. If the mainframe that the CCA-3074
is attached to supports multiple logical channel subsystems
(LCSS) then there is a requirement to attach to each LCSS via a
separate ESCON cable. Again if there are ESCON directors
available, it is possible for the CCA-3074 to communicate with
LPARs in each LCSS through the same interface.
Number of LPARs: There is at least one CNTLUNIT definition
associated with each LPAR that will be defined for use with the
CCA-3074. Each CNTLUNIT definition corresponds to one of
the CU definitions on the CCA-3074. A maximum of 16 CUs are
supported through each ESCON and FICON interface (maximum
of 96 per platform).
EMIF Support on the Mainframe?: EMIF (ESCON Multiple
Imaging Facility) or MIF (Multiple Imaging Facility) is the
mainframe mechanism that allows multiple LPARs to share a
single CHPID interface. If EMIF/MIF is not used then a Director
is necessary to allow multiple LPARs to be supported over a
single ESCON/FICON interface into the CCA-3074.
Operating Systems in Use?: Although the CCA-3074 supports
all major IBM mainframe operating systems, it is still useful
information when planning the use of the CCA-3074. If other
than IBM operating systems are in use (such as a Fujitsu
operating system) it is best to contact a Visara representative to
determine whether the CCA-3074 is a solution.