September 2002
Intermediate to advanced
332 pages
11h 1m
English
Content preview from IBM eServer zSeries 900 Technical Guide
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Chapter 3. Connectivity 83
Better manage the establishment of logical paths
3.1.6 Channel planning for availability
As a general recommendation, multiple path connections should have their paths spread
across channel cards that are on different MBAs from different processor clusters, avoiding
single points of failure. The CHPID Mapping Tool helps to establish the best I/O availability for
an initial z900 configuration (see Appendix E, “CHPID Mapping Tool” on page 285). However,
currently the CHPID mapping tool only works with z900
initial configurations as shipped by
manufacturing, and does not help on future upgrades.
The z900 Configurator rules also help single point of failure avoidance, as described in the
following examples using the ISC-3 ...
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