Re: IEFBR14 -- DSCB set? [WAS: Consultation on the Potential Risks of Deleting Specific Datasets]
If I remember correctly, extended-format PS datasets get an EOF written at allocation. Michael At 12:00 PM 5/8/2024, Seymour J Metz wrote: Content-Transfer-Encoding: base64Could you be thinking of the option to write an EOF when allocating a new PS? -- Shmuel (Seymour J.) Metz http://mason.gmu.edu/\ÛY]µèµõçH5æu5êu¬5àµê5®5ä5uç5åõõæB× ÖµÖ£×¦Ö·× ×ִשְ×רָ×ÖµÖ× ×Ö¹Ö¥× ×ְשַ×קֵּÖר From: IBM Mainframe Discussion List on behalf of Steve Thompson To: IBM-MAIN@LISTSERV.UA.EDU Subject: IEFBR14 -- DSCB set? [WAS: Consultation on the Potential Risks of Deleting Specific Datasets] I remember some releases ago of z/OS that the system will effectively do an OPEN if a DSN is created using IEFBR14. But now I can't seem to find where that is documented. So far I can't find it in the z/OS 2.2 or 3.1 JCL User's guide. I think that if the allocation specified the DCB info (LRECL, RECFM, and blksize) that this would be put into the VTOC when IEFBR14 was used to do the allocation. So in a case like this, would the last ref date be "empty"? Steve Thompson -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: IEFBR14 -- DSCB set? [WAS: Consultation on the Potential Risks of Deleting Specific Datasets]
I understood it to be a feature of DFSMS, and only for DFSMS controlled data sets. I don't *think* it is actually opening the data set. (And it has nothing to do with IEFBR14) I think it is either... A. Writing the EOF marker when a data set is allocated, or B. Acting like there's an EOF marker when the data set is opened, if it doesn’t have one Someone who knows please correct me... -Original Message- From: IBM Mainframe Discussion List On Behalf Of Steve Thompson Sent: Wednesday, May 8, 2024 11:54 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: IEFBR14 -- DSCB set? [WAS: Consultation on the Potential Risks of Deleting Specific Datasets] I remember some releases ago of z/OS that the system will effectively do an OPEN if a DSN is created using IEFBR14. But now I can't seem to find where that is documented. So far I can't find it in the z/OS 2.2 or 3.1 JCL User's guide. I think that if the allocation specified the DCB info (LRECL, RECFM, and blksize) that this would be put into the VTOC when IEFBR14 was used to do the allocation. So in a case like this, would the last ref date be "empty"? Steve Thompson -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: IEFBR14 -- DSCB set? [WAS: Consultation on the Potential Risks of Deleting Specific Datasets]
Let me try to remember the number of APARs for IEFBR14.. I seem to remember, "Eyecatcher" was one, not setting R15 = 0 was another. Steve Thompson On 5/8/2024 1:15 PM, Seymour J Metz wrote: What release? There have been multiple code changes over the years. -- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 עַם יִשְׂרָאֵל חַי נֵ֣צַח יִשְׂרָאֵ֔ל לֹ֥א יְשַׁקֵּ֖ר From: IBM Mainframe Discussion List on behalf of Steve Beaver <050e0c375a14-dmarc-requ...@listserv.ua.edu> Sent: Wednesday, May 8, 2024 1:06 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: IEFBR14 -- DSCB set? [WAS: Consultation on the Potential Risks of Deleting Specific Datasets] BR14 is 2 instructions LA 15,0 BR14 Sent from my iPhone No one said I could type with one thumb On May 8, 2024, at 12:00, Seymour J Metz wrote: Could you be thinking of the option to write an EOF when allocating a new PS? -- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 עַם יִשְׂרָאֵל חַי נֵ֣צַח יִשְׂרָאֵ֔ל לֹ֥א יְשַׁקֵּ֖ר From: IBM Mainframe Discussion List on behalf of Steve Thompson Sent: Wednesday, May 8, 2024 12:54 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: IEFBR14 -- DSCB set? [WAS: Consultation on the Potential Risks of Deleting Specific Datasets] I remember some releases ago of z/OS that the system will effectively do an OPEN if a DSN is created using IEFBR14. But now I can't seem to find where that is documented. So far I can't find it in the z/OS 2.2 or 3.1 JCL User's guide. I think that if the allocation specified the DCB info (LRECL, RECFM, and blksize) that this would be put into the VTOC when IEFBR14 was used to do the allocation. So in a case like this, would the last ref date be "empty"? Steve Thompson -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: IEFBR14 -- DSCB set? [WAS: Consultation on the Potential Risks of Deleting Specific Datasets]
It’s still basically 2 instructions Sent from my iPhone No one said I could type with one thumb > On May 8, 2024, at 12:15, Seymour J Metz wrote: > > What release? There have been multiple code changes over the years. > > -- > Shmuel (Seymour J.) Metz > http://mason.gmu.edu/~smetz3 > עַם יִשְׂרָאֵל חַי > נֵ֣צַח יִשְׂרָאֵ֔ל לֹ֥א יְשַׁקֵּ֖ר > > > From: IBM Mainframe Discussion List on behalf of > Steve Beaver <050e0c375a14-dmarc-requ...@listserv.ua.edu> > Sent: Wednesday, May 8, 2024 1:06 PM > To: IBM-MAIN@LISTSERV.UA.EDU > Subject: Re: IEFBR14 -- DSCB set? [WAS: Consultation on the Potential Risks > of Deleting Specific Datasets] > > BR14 is 2 instructions > > > LA 15,0 > BR14 > > > Sent from my iPhone > > No one said I could type with one thumb > >> On May 8, 2024, at 12:00, Seymour J Metz wrote: >> >> Could you be thinking of the option to write an EOF when allocating a new >> PS? >> >> -- >> Shmuel (Seymour J.) Metz >> http://mason.gmu.edu/~smetz3 >> עַם יִשְׂרָאֵל חַי >> נֵ֣צַח יִשְׂרָאֵ֔ל לֹ֥א יְשַׁקֵּ֖ר >> >> >> From: IBM Mainframe Discussion List on behalf of >> Steve Thompson >> Sent: Wednesday, May 8, 2024 12:54 PM >> To: IBM-MAIN@LISTSERV.UA.EDU >> Subject: IEFBR14 -- DSCB set? [WAS: Consultation on the Potential Risks of >> Deleting Specific Datasets] >> >> I remember some releases ago of z/OS that the system will >> effectively do an OPEN if a DSN is created using IEFBR14. But now >> I can't seem to find where that is documented. So far I can't >> find it in the z/OS 2.2 or 3.1 JCL User's guide. >> >> I think that if the allocation specified the DCB info (LRECL, >> RECFM, and blksize) that this would be put into the VTOC when >> IEFBR14 was used to do the allocation. >> >> So in a case like this, would the last ref date be "empty"? >> >> Steve Thompson >> >> -- >> For IBM-MAIN subscribe / signoff / archive access instructions, >> send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN >> >> >> -- >> For IBM-MAIN subscribe / signoff / archive access instructions, >> send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > > --- -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: IEFBR14 -- DSCB set? [WAS: Consultation on the Potential Risks of Deleting Specific Datasets]
Then there is the version that had an eyecatcher. -- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 עַם יִשְׂרָאֵל חַי נֵ֣צַח יִשְׂרָאֵ֔ל לֹ֥א יְשַׁקֵּ֖ר From: IBM Mainframe Discussion List on behalf of Lionel B. Dyck <057b0ee5a853-dmarc-requ...@listserv.ua.edu> Sent: Wednesday, May 8, 2024 1:14 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: IEFBR14 -- DSCB set? [WAS: Consultation on the Potential Risks of Deleting Specific Datasets] Actually IEFBR14 is SR 15,15 BR 14 Lionel B. Dyck <>< Github: https://github.com/lbdyck System Z Enthusiasts Discord: https://discord.gg/sze “Worry more about your character than your reputation. Character is what you are, reputation merely what others think you are.” - - - John Wooden -Original Message- From: IBM Mainframe Discussion List On Behalf Of Steve Beaver Sent: Wednesday, May 8, 2024 12:06 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: IEFBR14 -- DSCB set? [WAS: Consultation on the Potential Risks of Deleting Specific Datasets] BR14 is 2 instructions LA 15,0 BR14 Sent from my iPhone No one said I could type with one thumb > On May 8, 2024, at 12:00, Seymour J Metz wrote: > > Could you be thinking of the option to write an EOF when allocating a new PS? > > -- > Shmuel (Seymour J.) Metz > http://mason.gmu.edu/~smetz3 > עַם יִשְׂרָאֵל חַי > נֵ֣צַח יִשְׂרָאֵ֔ל לֹ֥א יְשַׁקֵּ֖ר > > > From: IBM Mainframe Discussion List on > behalf of Steve Thompson > Sent: Wednesday, May 8, 2024 12:54 PM > To: IBM-MAIN@LISTSERV.UA.EDU > Subject: IEFBR14 -- DSCB set? [WAS: Consultation on the Potential > Risks of Deleting Specific Datasets] > > I remember some releases ago of z/OS that the system will effectively > do an OPEN if a DSN is created using IEFBR14. But now I can't seem to > find where that is documented. So far I can't find it in the z/OS 2.2 > or 3.1 JCL User's guide. > > I think that if the allocation specified the DCB info (LRECL, RECFM, > and blksize) that this would be put into the VTOC when > IEFBR14 was used to do the allocation. > > So in a case like this, would the last ref date be "empty"? > > Steve Thompson > > -- > For IBM-MAIN subscribe / signoff / archive access instructions, send > email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > > > -- > For IBM-MAIN subscribe / signoff / archive access instructions, send > email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: IEFBR14 -- DSCB set? [WAS: Consultation on the Potential Risks of Deleting Specific Datasets]
What release? There have been multiple code changes over the years. -- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 עַם יִשְׂרָאֵל חַי נֵ֣צַח יִשְׂרָאֵ֔ל לֹ֥א יְשַׁקֵּ֖ר From: IBM Mainframe Discussion List on behalf of Steve Beaver <050e0c375a14-dmarc-requ...@listserv.ua.edu> Sent: Wednesday, May 8, 2024 1:06 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: IEFBR14 -- DSCB set? [WAS: Consultation on the Potential Risks of Deleting Specific Datasets] BR14 is 2 instructions LA 15,0 BR14 Sent from my iPhone No one said I could type with one thumb > On May 8, 2024, at 12:00, Seymour J Metz wrote: > > Could you be thinking of the option to write an EOF when allocating a new PS? > > -- > Shmuel (Seymour J.) Metz > http://mason.gmu.edu/~smetz3 > עַם יִשְׂרָאֵל חַי > נֵ֣צַח יִשְׂרָאֵ֔ל לֹ֥א יְשַׁקֵּ֖ר > > > From: IBM Mainframe Discussion List on behalf of > Steve Thompson > Sent: Wednesday, May 8, 2024 12:54 PM > To: IBM-MAIN@LISTSERV.UA.EDU > Subject: IEFBR14 -- DSCB set? [WAS: Consultation on the Potential Risks of > Deleting Specific Datasets] > > I remember some releases ago of z/OS that the system will > effectively do an OPEN if a DSN is created using IEFBR14. But now > I can't seem to find where that is documented. So far I can't > find it in the z/OS 2.2 or 3.1 JCL User's guide. > > I think that if the allocation specified the DCB info (LRECL, > RECFM, and blksize) that this would be put into the VTOC when > IEFBR14 was used to do the allocation. > > So in a case like this, would the last ref date be "empty"? > > Steve Thompson > > -- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > > > -- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: IEFBR14 -- DSCB set? [WAS: Consultation on the Potential Risks of Deleting Specific Datasets]
Actually IEFBR14 is SR 15,15 BR 14 Lionel B. Dyck <>< Github: https://github.com/lbdyck System Z Enthusiasts Discord: https://discord.gg/sze “Worry more about your character than your reputation. Character is what you are, reputation merely what others think you are.” - - - John Wooden -Original Message- From: IBM Mainframe Discussion List On Behalf Of Steve Beaver Sent: Wednesday, May 8, 2024 12:06 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: IEFBR14 -- DSCB set? [WAS: Consultation on the Potential Risks of Deleting Specific Datasets] BR14 is 2 instructions LA 15,0 BR14 Sent from my iPhone No one said I could type with one thumb > On May 8, 2024, at 12:00, Seymour J Metz wrote: > > Could you be thinking of the option to write an EOF when allocating a new PS? > > -- > Shmuel (Seymour J.) Metz > http://mason.gmu.edu/~smetz3 > עַם יִשְׂרָאֵל חַי > נֵ֣צַח יִשְׂרָאֵ֔ל לֹ֥א יְשַׁקֵּ֖ר > > > From: IBM Mainframe Discussion List on > behalf of Steve Thompson > Sent: Wednesday, May 8, 2024 12:54 PM > To: IBM-MAIN@LISTSERV.UA.EDU > Subject: IEFBR14 -- DSCB set? [WAS: Consultation on the Potential > Risks of Deleting Specific Datasets] > > I remember some releases ago of z/OS that the system will effectively > do an OPEN if a DSN is created using IEFBR14. But now I can't seem to > find where that is documented. So far I can't find it in the z/OS 2.2 > or 3.1 JCL User's guide. > > I think that if the allocation specified the DCB info (LRECL, RECFM, > and blksize) that this would be put into the VTOC when > IEFBR14 was used to do the allocation. > > So in a case like this, would the last ref date be "empty"? > > Steve Thompson > > -- > For IBM-MAIN subscribe / signoff / archive access instructions, send > email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > > > -- > For IBM-MAIN subscribe / signoff / archive access instructions, send > email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: IEFBR14 -- DSCB set? [WAS: Consultation on the Potential Risks of Deleting Specific Datasets]
I think that is it. Thank you. Steve Thompson On 5/8/2024 1:00 PM, Seymour J Metz wrote: Could you be thinking of the option to write an EOF when allocating a new PS? -- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 עַם יִשְׂרָאֵל חַי נֵ֣צַח יִשְׂרָאֵ֔ל לֹ֥א יְשַׁקֵּ֖ר From: IBM Mainframe Discussion List on behalf of Steve Thompson Sent: Wednesday, May 8, 2024 12:54 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: IEFBR14 -- DSCB set? [WAS: Consultation on the Potential Risks of Deleting Specific Datasets] I remember some releases ago of z/OS that the system will effectively do an OPEN if a DSN is created using IEFBR14. But now I can't seem to find where that is documented. So far I can't find it in the z/OS 2.2 or 3.1 JCL User's guide. I think that if the allocation specified the DCB info (LRECL, RECFM, and blksize) that this would be put into the VTOC when IEFBR14 was used to do the allocation. So in a case like this, would the last ref date be "empty"? Steve Thompson -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: IEFBR14 -- DSCB set? [WAS: Consultation on the Potential Risks of Deleting Specific Datasets]
BR14 is 2 instructions LA 15,0 BR14 Sent from my iPhone No one said I could type with one thumb > On May 8, 2024, at 12:00, Seymour J Metz wrote: > > Could you be thinking of the option to write an EOF when allocating a new PS? > > -- > Shmuel (Seymour J.) Metz > http://mason.gmu.edu/~smetz3 > עַם יִשְׂרָאֵל חַי > נֵ֣צַח יִשְׂרָאֵ֔ל לֹ֥א יְשַׁקֵּ֖ר > > > From: IBM Mainframe Discussion List on behalf of > Steve Thompson > Sent: Wednesday, May 8, 2024 12:54 PM > To: IBM-MAIN@LISTSERV.UA.EDU > Subject: IEFBR14 -- DSCB set? [WAS: Consultation on the Potential Risks of > Deleting Specific Datasets] > > I remember some releases ago of z/OS that the system will > effectively do an OPEN if a DSN is created using IEFBR14. But now > I can't seem to find where that is documented. So far I can't > find it in the z/OS 2.2 or 3.1 JCL User's guide. > > I think that if the allocation specified the DCB info (LRECL, > RECFM, and blksize) that this would be put into the VTOC when > IEFBR14 was used to do the allocation. > > So in a case like this, would the last ref date be "empty"? > > Steve Thompson > > -- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > > > -- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: IEFBR14 -- DSCB set? [WAS: Consultation on the Potential Risks of Deleting Specific Datasets]
Could you be thinking of the option to write an EOF when allocating a new PS? -- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 עַם יִשְׂרָאֵל חַי נֵ֣צַח יִשְׂרָאֵ֔ל לֹ֥א יְשַׁקֵּ֖ר From: IBM Mainframe Discussion List on behalf of Steve Thompson Sent: Wednesday, May 8, 2024 12:54 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: IEFBR14 -- DSCB set? [WAS: Consultation on the Potential Risks of Deleting Specific Datasets] I remember some releases ago of z/OS that the system will effectively do an OPEN if a DSN is created using IEFBR14. But now I can't seem to find where that is documented. So far I can't find it in the z/OS 2.2 or 3.1 JCL User's guide. I think that if the allocation specified the DCB info (LRECL, RECFM, and blksize) that this would be put into the VTOC when IEFBR14 was used to do the allocation. So in a case like this, would the last ref date be "empty"? Steve Thompson -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: IEFBR14 -- DSCB set? [WAS: Consultation on the Potential Risks of Deleting Specific Datasets]
BR14 is just a carrier and does nothing Sent from my iPhone No one said I could type with one thumb > On May 8, 2024, at 11:53, Steve Thompson wrote: > > I remember some releases ago of z/OS that the system will effectively do an > OPEN if a DSN is created using IEFBR14. But now I can't seem to find where > that is documented. So far I can't find it in the z/OS 2.2 or 3.1 JCL User's > guide. > > I think that if the allocation specified the DCB info (LRECL, RECFM, and > blksize) that this would be put into the VTOC when IEFBR14 was used to do the > allocation. > > So in a case like this, would the last ref date be "empty"? > > Steve Thompson > > -- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
