Re: file allocation dcb order
On 8/11/2011 8:42 AM, Shmuel Metz , Seymour J. wrote: In cabefxsoet9vpbx6a6h6suiesmppts9o8+gp7otlk_c6dweq...@mail.gmail.com, on 08/10/2011 at 12:11 PM, Scott Rowescott.r...@joann.com said: During dataset creation, the only DCB information available is from the allocation parameters (i.e. JCL or SVC 99), It's also possible to create a dataset with SVC 32, although I don't know what happens if you try it on an SMS volume. It fails with a return code of 192 (X'C0') Requested data set creation was not allowed by SMS. Maybe there is some flag to set that gets around around this, maybe not. I lean toward the maybe not side. -- Richard -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: file allocation dcb order
On 8/11/2011 4:06 PM, Rick Fochtman wrote: snip-- It's also possible to create a dataset with SVC 32, although I don't know what happens if you try it on an SMS volume. -unsnip-- I respectfully submit that the use of SVC 32 is archaic and cumbersome and should be discouraged in favor of DYNALLOC (SVC 99) whenever possible. How many of our list participants are sufficiently skillful to construct a partial DSCB correctly? It's also possible to use a JFCB rather than a DSCB with SVC 32. Not necessarily easier or harder, just another option. -- Richard -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: file allocation dcb order
In 4e4443e2.1040...@ync.net, on 08/11/2011 at 04:04 PM, Rick Fochtman rfocht...@ync.net said: I respectfully submit that the use of SVC 32 is archaic and cumbersome and should be discouraged in favor of DYNALLOC (SVC 99) whenever possible. I said that it was possible; I didn't recommend it. How many of our list participants are sufficiently skillful to construct a partial DSCB correctly? Probably a dozen. ObRobertZimmerman Of those, how many would actually do it in a production environment. -- Shmuel (Seymour J.) Metz, SysProg and JOAT ISO position; see http://patriot.net/~shmuel/resume/brief.html We don't care. We don't have to care, we're Congress. (S877: The Shut up and Eat Your spam act of 2003) -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: file allocation dcb order
I've done it, but I haven't had any reason to in the last couple decades, nor do I expect to. On Fri, Aug 12, 2011 at 5:02 PM, Shmuel Metz (Seymour J.) shmuel+ibm-m...@patriot.net wrote: In 4e4443e2.1040...@ync.net, on 08/11/2011 at 04:04 PM, Rick Fochtman rfocht...@ync.net said: I respectfully submit that the use of SVC 32 is archaic and cumbersome and should be discouraged in favor of DYNALLOC (SVC 99) whenever possible. I said that it was possible; I didn't recommend it. How many of our list participants are sufficiently skillful to construct a partial DSCB correctly? Probably a dozen. ObRobertZimmerman Of those, how many would actually do it in a production environment. -- Shmuel (Seymour J.) Metz, SysProg and JOAT ISO position; see http://patriot.net/~shmuel/resume/brief.html We don't care. We don't have to care, we're Congress. (S877: The Shut up and Eat Your spam act of 2003) -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html CONFIDENTIALITY/EMAIL NOTICE: The material in this transmission contains confidential and privileged information intended only for the addressee. If you are not the intended recipient, please be advised that you have received this material in error and that any forwarding, copying, printing, distribution, use or disclosure of the material is strictly prohibited. If you have received this material in error, please (i) do not read it, (ii) reply to the sender that you received the message in error, and (iii) erase or destroy the material. Emails are not secure and can be intercepted, amended, lost or destroyed, or contain viruses. You are deemed to have accepted these risks if you communicate with us by email. Thank you. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: file allocation dcb order
---snip- I've done it, but I haven't had any reason to in the last couple decades, nor do I expect to. unsnip- Nor have I. My use of DAIR also ended when DYNALLOC showed up and I've scrupulously avoided it every bit as much as I've avoided SVC 32 usage. I once had to write a stand-alone program that would simulate OS/360 DASD allocation; I used the I/O routines lifted from CLIP/360 (Stand-alone) and was able to IPL a OS/360 system weekly to check results. Took 12 weeks to learn all the wrinkles, including how to maintain the FORMAT-5 DSCB chain, but it was a great learning experience. Did it for NCSS and I'd sure like to get the programs I used and/or modified for their CP67/CMS system. Much learning there, most of which is now forgotten. Rick -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: file allocation dcb order
---snip- I respectfully submit that the use of SVC 32 is archaic and cumbersome and should be discouraged in favor of DYNALLOC (SVC 99) whenever possible. I said that it was possible; I didn't recommend it. ---unsnip Noted. snip How many of our list participants are sufficiently skillful to construct a partial DSCB correctly? Probably a dozen. ObRobertZimmerman Of those, how many would actually do it in a production environment. -unsnip Given the ease of use of DYNALLOC, I seriously doubt that anyone would even attempt it anymore. Except perhaps as an exercise in masochism. :-) Rick -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: file allocation dcb order
Sir/s, Et ' al, Forgive me for intruding ... and yes, I have not found out how this thread started nor am I sure why SVC32 (I presume svc x'20') is in question perhaps the original poster is working with DADSM ??. None the less, the only thing I wanted to bring up is that one does not, necessarily, have to manually build a complete DSCB. It's just as easy (depending on circumstances) to simply issue an OBTAIN and modify if need be. Kind Regards Jim Thomas 617-233-4130 (mobile) 636-294-1014(res) j...@thethomasresidence.us (Email) -Original Message- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@bama.ua.edu] On Behalf Of Rick Fochtman Sent: Friday, August 12, 2011 5:14 PM To: IBM-MAIN@bama.ua.edu Subject: Re: file allocation dcb order ---snip- I respectfully submit that the use of SVC 32 is archaic and cumbersome and should be discouraged in favor of DYNALLOC (SVC 99) whenever possible. I said that it was possible; I didn't recommend it. ---unsnip Noted. snip How many of our list participants are sufficiently skillful to construct a partial DSCB correctly? Probably a dozen. ObRobertZimmerman Of those, how many would actually do it in a production environment. -unsnip Given the ease of use of DYNALLOC, I seriously doubt that anyone would even attempt it anymore. Except perhaps as an exercise in masochism. :-) Rick -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html - No virus found in this message. Checked by AVG - www.avg.com Version: 10.0.1392 / Virus Database: 1520/3829 - Release Date: 08/12/11 -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: file allocation dcb order
In cabefxsoet9vpbx6a6h6suiesmppts9o8+gp7otlk_c6dweq...@mail.gmail.com, on 08/10/2011 at 12:11 PM, Scott Rowe scott.r...@joann.com said: During dataset creation, the only DCB information available is from the allocation parameters (i.e. JCL or SVC 99), It's also possible to create a dataset with SVC 32, although I don't know what happens if you try it on an SMS volume. -- Shmuel (Seymour J.) Metz, SysProg and JOAT ISO position; see http://patriot.net/~shmuel/resume/brief.html We don't care. We don't have to care, we're Congress. (S877: The Shut up and Eat Your spam act of 2003) -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: file allocation dcb order
snip-- It's also possible to create a dataset with SVC 32, although I don't know what happens if you try it on an SMS volume. -unsnip-- I respectfully submit that the use of SVC 32 is archaic and cumbersome and should be discouraged in favor of DYNALLOC (SVC 99) whenever possible. How many of our list participants are sufficiently skillful to construct a partial DSCB correctly? Rick -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: file allocation dcb order
On 8/11/2011 5:04 PM, Rick Fochtman wrote: I respectfully submit that the use of SVC 32 is archaic and cumbersome and should be discouraged in favor of DYNALLOC (SVC 99) whenever possible. I have a 33.3 RPM turntable, cassette tape recorder, VHS recorder, and I have been known to use a manual screwdriver. I even look at maps when I need to drive somewhere. When something works, age should be a secondary consideration to capability. SVC 32 allows some things to be done that are difficult or messy with SVC 99. If you railed against DAIR I might have a little more understanding. How many of our list participants are sufficiently skillful to construct a partial DSCB correctly? Most of the dinosaurs, who had to run OS/360 despite IBM's help. g Completing a DSCB is no more difficult than setting up a JFCB. Gerhard Postpischil Bradford, VT -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: file allocation dcb order
At 19:23 -0400 on 08/11/2011, Gerhard Postpischil wrote about Re: file allocation dcb order: Most of the dinosaurs, who had to run OS/360 despite IBM's help. g Completing a DSCB is no more difficult than setting up a JFCB. True. You expand the mapping macro, map it over an area of the correct length, and fill in the fields. OTOH, a JFCB is usually not created from scratch but pre-filled in via a RDJFCB, then updated if needed, before being used by OPENJ. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: file allocation dcb order
On Wed, 10 Aug 2011 17:17:38 +0200, MONTERO ROMERO, ENRIQUE ELOI wrote: I am looking for which is the DCB order to allocate a dataset. I mean, Program DCB, JCL DCB, Dataset DCB. Read the recent thread here on ORRUPT PDS - I/O ERROR and try to glean some truth from it. Is there some IBM doc that explains such order? Yes, but many don't read it. I'd start with JCL Reference and Using Data Sets. -- gil -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: file allocation dcb order
On 8/10/2011 9:17 AM, MONTERO ROMERO, ENRIQUE ELOI wrote: Hi to all, I am looking for which is the DCB order to allocate a dataset. I mean, Program DCB, JCL DCB, Dataset DCB. Is there some IBM doc that explains such order? Best regards Enrique Montero Sigh. DCB's have _nothing_ to do with allocation. DCB information is used by the OPEN routines. SPACE and DATACLAS JCL parameters affect allocation. As far as sources for filling in DCB parameters and the priority of these sources, there was a recent, tedious thread on this listserv. The DCB fields that participate in what is called the DCB merge are: RECFM, LRECL, BLKSIZE, BUFNO, OPTCD, DSORG; ignoring the impacts of the DCBE and OPEN exits and OPEN RDJFCB, the order of priority for DCB sources at OPEN time is: 1. If a parameter has a non-zero value coded in the program, that value is used 2. If a value is omitted from the program but coded in the JCL, the JCL value will be used 3. If a value is omitted from the program and the JCL but exists in a label, the value from the label is used After the merge, OPEN checks for completeness; if only the BLKSIZE remains un-initialized, if a new data set is being created, and if the LRECL and RECFM are supplied, and if RECFM is not U, the system will compute an optimal blocksize and place it in the DCB. Next OPEN checks for consistency; if all is well, OPEN gets buffers and, for input files, primes the buffers. The primary information source is DFSMS Using Data Sets (SC26-7410; from the z/OS Internet library, you can download DGT2D4A0.PDF for the z/OS V1R13 version); check out chapter 21 Specifying and Initializing Data Control Blocks, the section Using OPEN to Prepare a Data Set for Processing; p332 has a diagram with a detailed explanation. Note that high level languages might modify this behavior using exits behind the scenes; check the docs for the language of interest. -- Kind regards, -Steve Comstock The Trainer's Friend, Inc. 303-393-8716 http://www.trainersfriend.com * Special promotion: 15% off on all DB2 training classes scheduled by September 1, taught by year end 2011 * Check out our entire DB2 curriculum at: http://www.trainersfriend.com/DB2_and_VSAM_courses/DB2curric.htm -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: file allocation dcb order
By allocation do you mean creation? During dataset creation, the only DCB information available is from the allocation parameters (i.e. JCL or SVC 99), so the dataset attributes are assigned from there. However these attributes may be overridden during OPEN. On Wed, Aug 10, 2011 at 11:53 AM, Paul Gilmartin paulgboul...@aim.comwrote: On Wed, 10 Aug 2011 17:17:38 +0200, MONTERO ROMERO, ENRIQUE ELOI wrote: I am looking for which is the DCB order to allocate a dataset. I mean, Program DCB, JCL DCB, Dataset DCB. Read the recent thread here on ORRUPT PDS - I/O ERROR and try to glean some truth from it. Is there some IBM doc that explains such order? Yes, but many don't read it. I'd start with JCL Reference and Using Data Sets. -- gil -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html CONFIDENTIALITY/EMAIL NOTICE: The material in this transmission contains confidential and privileged information intended only for the addressee. If you are not the intended recipient, please be advised that you have received this material in error and that any forwarding, copying, printing, distribution, use or disclosure of the material is strictly prohibited. If you have received this material in error, please (i) do not read it, (ii) reply to the sender that you received the message in error, and (iii) erase or destroy the material. Emails are not secure and can be intercepted, amended, lost or destroyed, or contain viruses. You are deemed to have accepted these risks if you communicate with us by email. Thank you. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: file allocation dcb order
Steve you are such a kill-joy - must be time we had another endless thread about this ... ;-) Nice post though. Shane ... -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
