Password protection is retained when volumes of a multivolume data set are switched. If the following conditions are met, the system accepts a newly-mounted tape volume to be used for input or a newly-mounted direct access volume:

• The data set names are the same in the password record for the data set and the job file control block (JFCB). (This ensures that the problem program has not changed the data set name in the JFCB since the data set was opened.)
• The protection-mode indicator in the password record is compatible with the processing mode, and a valid password has been supplied.

The system accepts a newly-mounted tape volume for output under any of the following conditions:

• The security indicator in the HDR1 label indicates password protection; the data set name in the password record is the same as the data set name in the JFCB; and the protection-mode indicator is compatible with the processing mode. (If the data set name in the JFCB has been changed, a new password is requested from the operator.)
• The security indicator in the HDR1 label does not indicate password protection. (A new label is written with the security indicator indicating password protection.)
• Only a volume label exists. (An HDR1 label is written with the security indicator indicating password protection.)