Joined: 23 Nov 2006 Posts: 19270 Location: Inside the Matrix
It is best to delete and reallocate datasets when you want to change the dcb specifications.
It is rare for a mainframe dastaset to have a password. Securing datasets is done via the security software used om the system (RACF, ACF2, or TSS). Permissions are granted to individuals or groups rather than using dataset passwords. If you talk with your security administration people, they can explaikn how to secure your dataset(s).