System Components and Execution › CA TLMS Major Features › Input Data Set Name Verification

Input Data Set Name Verification

The optional input data set name verification feature compares the fully qualified data set name and file sequence number furnished in the JCL for all input files against the file numbers and data set names recorded in the Volume Master File. Extending data set name validation from the system default of 17 characters to the entire 44-character data set name enhances data set security.

• If a match is found, the tape is accepted and processing continues normally.
• If a match is not found, the tape is rejected, and the following message is sent to the console:

  CAT9030I volser ON DRIVE dddd INPUT DSN INVAL RETURN TO LIBRARY

For SL tapes, the job is abended with an S713-04 completion code. If the tape label does not match the last 17 characters of the DSN field of the JCL, the job will abend with an S813 abend. For NL, NSL, and BLP tapes, the job will continue to mount and reject the same volume until canceled by the operator.

For BLP tapes, the file sequence number provided in the JCL is translated to the equivalent SL file number before the file number and data set name comparisons are made. If they do not match, the tape is rejected. For non-specific SL requests, the tape is rejected and a new mount requested. This prevents unauthorized persons from dumping header and trailer labels.

This feature does not apply to foreign tape volumes.

The input data set name verification feature is installed by setting the IDSNVER system option to YES.