CA Dynam for VSE User Guide

Using Cataloged Information
Protecting Data Sets
Password Protection
Specify a data set password in the DYNCAT DEFINE command to protect
individual data sets from unauthorized access.
The following example assigns the password RESTRICT to the data set. The
password is required before the characteristics of the data set can be manually
modified.
DEFINE 'PAYROLL FILE' NGEN=7 PASSWORD='RESTRICT'
To modify the number of retention generations for PAYROLL FILE, you must
issue the following command:
ALTER 'PAYROLL FILE' PASSWORD='RESTRICT' NGEN=5
The password is not required for online access to the data set or DYNCAT ADD
modifications of the data set. Use the ALTER command's LOCK option to
prohibit all modifications to a data set (locking the data set):
ALTER 'PAYROLL FILE' LOCK PASSWORD='RESTRICT' (The proper password unlocks the
data set.)
There can be no maintenance on a locked data set; no new versions can be
created. The existing versions of the data set can still be called for as input,
however. You can lock out input access, as well:
ALTER 'PAYROLL FILE' UNLOCK PASSWORD='RESTRICT'
ALTER 'PAYROLL FILE' VERSION=1 LOCK PASSWORD='RESTRICT'
ALTER 'PAYROLL FILE' LOCK PASSWORD=RESTRICT
To lock a particular version, the data set as a whole must first be unlocked.
To change a data set password, use the ALTER command. The following
example replaces the PAYROLL FILE password, RESTRICT, with the new
password, SECURITY.
ALTER 'PAYROLL FILE' PASSWORD='RESTRICT' NEWPSWD='SECURITY'
Establishing Data Set Ownership
You can establish data set ownership with the DYNCAT DEFINE and ALTER
commands. This is different from Catalog ownership. Data set ownership
enables you to divide the tape library into sublibraries.
Chapter 2: Maintaining Tape Files 2–57