On Mon, 22 Aug 2016 15:43:47 +0000, Windt, W.K.F. van der (Fred) wrote:
>
>I think there is (or was?) a limit of 255 extents that can be allocated to a 
>DD name. Where a PDS(E) always counts as one extent regardless of the number 
>of extents allocated for that PDS(E). Any sequential dataset counts as the 
>number of extents allocated for that dataset.
>  
I suspect (WAG) that a PDS counts as the actual number of extents, but I've 
heard
that a PDSE counts as only one.

How is a PDSE represented in the ECB?

I understand that the hazard in extending a shared PDS is that an added member
may have a TTR identifying an extent not in a sharing job's ECB.  Does PDSE
eliminate this hazard by appearing as a single extent?

-- gil

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