Craddock, Chris wrote:
... PLO came in with G2 CMOS.
No. PLO was introduced with G3 CMOS. (I can still remember being jealous
that our "little" P/390 running VM and VSE had PLO while our "big"
two-way 9672-R22 running MVS didn't.) PLO was later retrofitted to G2
along with several other features in an effort to expand the scope of
the first Architectural Level Set.
I seriously doubt there are ANY production systems in use today
that do NOT have PLO. Dual-pathing is vastly more prone to error
than simply placing a stick in the sand and saying; this is the
minimum function level required for this software.
Anyone running OS/390 V2R9 or lower, VSE/ESA 2.6 or lower, or VM/ESA
*might* be running on a machine without PLO.
I am constantly amazed at the gymnastics some people will go through
to "support" back back back level "customers". One thing you can
say for sure about customers who are not on reasonably current
hardware and software... they aren't spending any money! Why would
anyone go to that amount of trouble when there's no revenue in it
anyway? Charity?
They *do* spend money in the form of annual maintenance fees to ISVs.
--
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| Edward E. Jaffe | |
| Mgr, Research & Development | [EMAIL PROTECTED] |
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