Check the Dataclass. Does it have SPACE CONSTRAINT specified? We have b37s on occasions, as the process reduces space to the point where the data set cannot allocate sufficient storage
https://www.ibm.com/support/knowledgecenter/en/SSLTBW_2.1.0/com.ibm.zos.v2r1.idas200/handle05.htm#handle05 If you have SPACE=(...,RLSE) + Space Constraint Relief = SB37 randomly Lizette > -----Original Message----- > From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On Behalf Of > Vernooij, Kees (ITOP NM) - KLM > Sent: Monday, March 04, 2019 8:50 AM > To: IBM-MAIN@LISTSERV.UA.EDU > Subject: Re: Disk space allocation question [EXTERNAL] > > There are ACS options: > ACS routines can assign a Dataclass with Space Atributes plus the option that > it will override space in JCL, even for non-SMS managed datasets. > For SMS managed datasets, the DataClass' Space Constraint Relief options can > adjust space allocations. > > Kees > > > > -----Original Message----- > > From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] > > On Behalf Of Feller, Paul > > Sent: 04 March, 2019 16:40 > > To: IBM-MAIN@LISTSERV.UA.EDU > > Subject: Re: Disk space allocation question [EXTERNAL] > > > > It is my understanding that the ALLOC should not step if you have > > SPACE coded in your JCL. By default you should get your space > > request, though it might be in more than one extent (up to 5). Now if > > you have some 3rd party software installed it might be stepping in to > > prevent the initial > > X37 abend on allocation. I don't recall if you could code something > > in the ACS routines to step in to adjust the primary allocation. > > > > Thanks.. > > > > Paul Feller > > AGT Mainframe Technical Support > > > > -----Original Message----- > > From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] > > On Behalf Of Elardus Engelbrecht > > Sent: Monday, March 04, 2019 6:33 AM > > To: IBM-MAIN@LISTSERV.UA.EDU > > Subject: Re: Disk space allocation question [EXTERNAL] > > > > Sean Gleann wrote: > > > > >Does z/OS / SMS have a set of default space allocation sizes and if > > >so, > > where are they held and can I alter or control them? > > > > Look in ALLOCxx as kindly suggested by Roger Lowe. > > > > If you know what SMS routines were used, look at their definitions. > > > > > > >I have a situation where insufficient contiguous disk space results > > >in > > the SPACE request parameters supplied for a DISP=(NEW...) file with > > values that are too low to fulfil the final requirements. > > >Example: I request SPACE=(TRK,(9000,1000)… and what I get is > > ...TRK,(7200,500), which eventually leads to a B37 abend. > > > > Please post that full B37 abend message. There may be another reason > > why you are not getting what you want. > > > > What about trying to use more than one volser for your allocation > > attempts? > > > > > > >It's that 'eventually' bit that is most disheartening. I would far > > rather have the space request completely refused along with a job > > abend rather than have the system 'try to help' me. > > > > Buy more disks... ;-) > > > > Pre-allocations may help before you actually use it, but of course, > > how do you know what size is 'correct'? > > > > Groete / Greetings > > Elardus Engelbrecht > > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
