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
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________________________________________
From: IBM Mainframe Discussion List
<[email protected]> on behalf of Steve
Thompson <[email protected]Ù[ÙY@sday, May 8, 2024 12:54 PM
To: [email protected]
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
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