R.S. wrote:
Tom Marchant wrote:
[...]
No. Sharing includes IPLing the 1.8 system, then shutting it down and
IPLing the 1.4 system.
Not exactly.
IBM uses two terms: coexistence and fallback. The first means sharing,
the second means what you wrote above.
In fact both require the same "N+3" level, but could require different
PTF level.
<snip>
Not so. There is really no difference despite the use of two terms.
In z/OS Planning for Installation, topic 1.6.2, "Understanding
fallback," says, " Fallback and coexistence are alike in that the
PTFs that ensure coexistence are the same ones that ensure fallback."
The 1.6, "Coexistence and Fallback," can be viewed here (watch
for wrap):
http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/BOOKS/E0Z2B118/1.6?SHELF=EZ2ZO10H&DT=20060712172902
--
John Eells
z/OS Technical Marketing
IBM Poughkeepsie
[EMAIL PROTECTED]
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