> The whole point of expanded storage was that it was less expensive.
> Once IBM started carving out expanded memory from the same pool as
> regular memory, it became pointless, but by then IBM had code in place
> that provided an incentive to go along with the charade.

  That was the original point.  But when the price of real memory 
declined to the point where the ESA/390 31-bit real addressing
architecture limit became a practical constraint, expanded storage 
provided a way to have more than 2GB of processor memory 
(real + expanded) in a logical partition. 

Jim Mulder   z/OS System Test   IBM Corp.  Poughkeepsie,  NY



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