On 19 Dec 2007 07:44:18 -0800, in bit.listserv.ibm-main (Message-ID:<[EMAIL PROTECTED]>) [EMAIL PROTECTED] (J Ellis) wrote:

//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 ? 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)

I've also seen problems when a UNIT name was specified for an already-catalogued dataset, as is the case here.

Note also that the 2nd step specifies up to 59 units. I know that VSAM allocates a primary amount on each new volume; I can't recall, offhand, if PS does the same. (Is it PS? No DSORG was specified.)

Final note from me: Since no UNIT was specified in the original allocation, I wouldn't be surprised if either SMS or an allocation exit got involved at some point. In either case, they might be involved at the time of grabbing another extent.


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