That's a definite maybe. For labelled tapes the truncated name is stored with the data.
-- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 עַם יִשְׂרָאֵל חַי נֵ֣צַח יִשְׂרָאֵ֔ל לֹ֥א יְשַׁקֵּ֖ר ________________________________________ From: IBM Mainframe Discussion List <[email protected]> on behalf of Mike Shaw <[email protected]> Sent: Friday, January 30, 2026 12:16 PM To: [email protected] <[email protected]> Subject: z/OS MVS JCL User's Guide content error External Message: Use Caution Everyone, The sentence below appears in the z/OS MVS JCL User's Guide in all versions from z/OS V2R1 through z/OS V3R1, in the Chapter 12 section entitled "Identification of Data Set": "When creating a data set, assign a name to the data set in the DSNAME parameter. The data set name is stored with the data set." That second sentence is just flat wrong. The data set name can be stored in an F1 DSCB in the VTOC on the volume where the data set resides, and it can be stored in a catalog, but it is never stored with the data set. Mike Shaw MVS/QuickRef Support Group Chicago-Soft, Ltd. ---------------------------------------------------------------------- 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
