"J Ellis" <[EMAIL PROTECTED]> wrote in message
news:<[EMAIL PROTECTED]>...
> application folks have a data set that is allocated as:
> 
> //DD1  DD DSN=app.data,              
> //           DCB=(LRECL=567,BLKSIZE=27783,RECFM=FB),      
> //           SPACE=(CYL,(1,10)),DISP=(,catlg)
> 
> 
> later on, they use this data set as output to a syncgener step as:
> 
> //COPY1.SYSUT2  DD DSN=app.data,              
> //           DCB=(LRECL=567,BLKSIZE=27783,RECFM=FB),      
> //           SPACE=(CYL,(300,50)),DISP=OLD,UNIT=(SYSDA,59) 
> 
> aside from the obvious things you may comment on, when this data set
is
> accessed in the second step, allocation wise, isn't the only thing
that gets
> a temporary bump the secondary allocation from 10 to 50 ? The primary
will
> still be 1, yes ? 

If the first step did nothing else than allocate the dataset: Yes and
Yes.


> They had an SB37-04 last night on a volume that only had 280 free
cylinders,
> I think they had already hit 16 extents on the data set not that the
primary
> couldn't be filled. No way to check since they deleted it and
reallocated it
> at (400,100)
> 

Yes, you can: check the SMF15 records, this will show the primary and
secondary space and the number of extents.

Kees.
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