And didn't the need for a "pattern dscb" go away is the gdg was SMS
managed? 

-----Original Message-----
John P Kalinich

> Chase, John wrote:
> > Hi, All,
> >
> > A colleague asks, "When did the requirement to pre-allocate the 
> > first "goovoo" as a "seed" go away?"
> >
> > TIA,
> >
> >     -jc-
>
> I don't think this was ever a requirement.
> You needed to allocate a "PATTERN DSCB" with the GDG base name 
> (everything but the GnnnnV00).
> This had to be on the same volume as the catalog the GDG was in. This 
> was used to get the default DCB info.
> It could be avoided by specifying the DSCB keyword in the DD card that

> created the GDS. There may have been a time when you couldn't specify 
> the DSCB keyword and had to have a pattern DSCB, but I don't know.
>

The pattern or model DSCB could be specified via the DCB=dsname
parameter.
This avoided having to allocate a GDG base name for every file.

Regards,
John K

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