A default DATACLAS that specifies DSORG=PS. DATACLAS is not restricted to only SMS allocations
> -----Original Message----- > From: IBM Mainframe Discussion List <[email protected]> On > Behalf Of Lennie Dymoke-Bradshaw > Sent: Wednesday, June 16, 2021 8:27 AM > To: [email protected] > Subject: Re: Coding for the future > > Shmuel (Seymour J.) Metz wrote, > " Prior to DFSMS a new PS DASD data set always had the original contents > until you opened it." > > That was my experience. > But I think the writing of an EOF mark only applies to SMS managed data. I > cannot find any SMS options to specify controls. > Lennie > > -----Original Message----- > From: IBM Mainframe Discussion List <[email protected]> On > Behalf Of > Seymour J Metz > Sent: 16 June 2021 16:02 > To: [email protected] > Subject: Re: Coding for the future > > There used to be an SMS option to write an EOF. I don't know whether z/OS > 1.11 changed it to no longer be optional, but even if it is still an option > I can't imagine why an installation wouldn't turn it on. > > Prior to DFSMS a new PS DASD data set always had the original contents until > you opened it. > > > -- > Shmuel (Seymour J.) Metz > https://urldefense.com/v3/__http://mason.gmu.edu/*smetz3__;fg!!JmPEg > BY0HMszNaDT!-LwdGns7WciBIQYTnxKo- > iMX45_cxA4HT0KXI5apOCEo3Nu2oyuXl6D7e-FuiQ$ > > ________________________________________ > From: IBM Mainframe Discussion List [[email protected]] on > behalf of > Lennie Dymoke-Bradshaw [0000032fff1be9b4-dmarc- > [email protected]] > Sent: Wednesday, June 16, 2021 7:43 AM > To: [email protected] > Subject: Re: Coding for the future > > Clearly I am too old. > I wondered if there was a setting to alter system behaviour. Where is it? > > Lennie Dymoke-Bradshaw > > -----Original Message----- > From: IBM Mainframe Discussion List <[email protected]> On > Behalf Of > Seymour J Metz > Sent: 16 June 2021 09:27 > To: [email protected] > Subject: Re: Coding for the future > > Is any installation these days configured to not write EOF on new PS DASD > files? > > > -- > Shmuel (Seymour J.) Metz > https://urldefense.com/v3/__http://mason.gmu.edu/*smetz3__;fg!!JmPEg > BY0HMszNaDT!-LwdGns7WciBIQYTnxKo- > iMX45_cxA4HT0KXI5apOCEo3Nu2oyuXl6D7e-FuiQ$ > > ________________________________________ > From: IBM Mainframe Discussion List [[email protected]] on > behalf of > Lennie Dymoke-Bradshaw [0000032fff1be9b4-dmarc- > [email protected]] > Sent: Wednesday, June 16, 2021 3:42 AM > To: [email protected] > Subject: Re: Coding for the future > > Does the result depend on whether there is an EOF marker in the file? > Traditionally, such EOF markers were not written to new files. I know that > ISPF 3.2 does do this today, but I suspect that common (step) allocation > does not. > > Lennie Dymoke-Bradshaw > https://urldefense.com/v3/__https://secure- > web.cisco.com/1vnmTIoBKBMQy2Ips6r7TwKWaTHCFuIAlFkMQgxfymMedYT > __;!!JmPEgBY0HMszNaDT!-LwdGns7WciBIQYTnxKo- > iMX45_cxA4HT0KXI5apOCEo3Nu2oyuXl6BSL1ZTSA$ > pRz8mYvXivQpfzjW0tn7ZndCUx184ciY1pnobuAeSQ3N7jZ01lmoar6- > 0raxRg1n5tG4eq0vq0Q3 > MPoirYJMH6gJS3Rv3rxUUBOux8d5c88QNQycbzb8mA1C9Ab738EUGXAkXGH > mlcw695ga7QSt77LT > J96hctr4Tgq_Ju9SUiyajOPMp- > aYPUEiG4IB7EmNHSViZThWtuwKialRRMHcb97hOvBN3BiYrgWV > w3oyuO55BZAd7IYdQDAVB2dHPHktBoQoh-g- > t23TvTF_2sgNmQWl42cWu36j2ZZhcOoeq-iT8qo2 > 9z2DwC- > QUaMFB7qpL6h5JpNNQbD1syxP42TcoMTeJEjOWN4qKMYhInx9wfUhsPNy55 > LkiUHRU3SP > 6vBlh5IGH-I0GOY4H-_0en/https%3A%2F%2Frsclweb.com > 'Dance like no one is watching. Encrypt like everyone is.' > > -----Original Message----- > From: IBM Mainframe Discussion List <[email protected]> On > Behalf Of > Paul Gilmartin > Sent: 16 June 2021 04:50 > To: [email protected] > Subject: Re: Coding for the future > > On Tue, 15 Jun 2021 22:43:41 -0400, Bob Bridges wrote: > > > >What you describe here reminds me of a function I use in many Excel > programs to determine the last data row in a worksheet. I use it routinely, > so it has to work even in odd circumstances such as no rows, ... > > > It irritates me that (AFAIK) ISPF Edit provides no way to extract the size > of a file without getting a warning (RC=4) on an empty file. > > -- gil > > ---------------------------------------------------------------------- > 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 > > ---------------------------------------------------------------------- > 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 > > ---------------------------------------------------------------------- > 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 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
