See Bill Godfrey's message; the ALLOC specifies an average block size, overriding the CYLINDER specification.
-- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 ________________________________________ From: IBM Mainframe Discussion List <[email protected]> on behalf of David Spiegel <[email protected]> Sent: Monday, February 10, 2020 7:44 PM To: [email protected] Subject: [SUSPECTED SPAM] Re: ALLOC command releasing space Hi Fred, This might occur because: - Your shop has a storage software product (e.g. Mainview SRM) which adjusts allocations automatically. - Your shop has ALLOCATION Exits (The ISPF Allocation Exit is the not the same as the TSO/Batch Allocation Exit). Regards, David On 2020-02-10 19:27, Fred Kaptein wrote: > Hello, > I have a user that is allocating a data set in TSO and REXX using the > following command > > ALLOC DA('ABCD.EFG') NEW CATALOG UNIT(SYSALLDA) DSNTYPE(LIBRARY) LRECL(121) > RECFM(F B A) CYL SPACE(9) BLOCK(27951) DIR(100) > > The data set is allocated, but the unused space is released, so the data set > is only 6 tracks. > I allocate the same data set in ISPF 3.2 and the data set is allocated with 9 > cylinders. > > The same SMS management class and data class is assigned for both allocations. > > Is it possible not to release unused space when using the TSO ALLOC command? > > ---------------------------------------------------------------------- > 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
