146IBM TotalStorage DS6000 Series: Performance Monitoring and Tuning
used logical disks. For open systems, we recommend the use of SDD (subsystem device
driver) for load balancing and failover. For the zSeries servers the multi-pathing facility is
already part of the I/O subsystem—I/O operations can be started on one channel and
reconnect on a different one; so the recommendation is to lay out alternate paths to the
devices. Both SDD and z/OS automatically recognize and exploit the preferred path
characteristics of the DS6000.
5.3 FICON
FICON is a Fibre Connection used with zSeries servers (see 2.10.3, “FICON attachment” on
page 47). The conn ...
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