Charles, Yes you have implicitly requested one volume.
Assuming the DATACLAS has 1 or blank for the unit count field you have effectively coded a unit count of 1 in this JCL. You would have to code UNIT=(SYSDA,p) where "p" is >1, or multiple volsers to increase the unit count. Ron > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:[email protected]] > On Behalf Of Charles Mills > Sent: Wednesday, October 16, 2013 3:32 PM > To: [email protected] > Subject: [IBM-MAIN] Unit-count default with UNIT=group-name? > > I'm looking at the Enterprise COBOL V5.1 U/G which says that SYSUT5, 6, 7 > and 15 must all be single-volume allocations. > > If I code SPACE=(CYL,(2,2,0)),UNIT=SYSDA is that implicitly a request for only > one volume, or might z/OS give me one cylinder each on two volumes or a > secondary allocation on a second device (assuming, of course, that SYSDA > were multiple volumes, as it usually would be)? The example in the U/G > shows only UNIT=SYSDA,SPACE=(CYL,(1,1)). The JCL Reference says that > UNIT=device-address is a request for only a single volume but appears to be > silent on UNIT=group-name. > > It's machine-generated JCL so it is not so simple as "why don't you just code a > unit count of 1 and quit worrying about it?" A unit count will require a > program change. > > Thanks, > Charles > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, send email to > [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
