Working with critical system values before you install software

Record and print system values. Check the QSYSLIBL, QUSRLIBL, QALWOBJRST, and QVFYOBJRST system values.

System values are IBM-supplied objects that can be modified from their shipped value to tailor certain aspects of the operating system to your environment. The software installation program will overlay these objects on your system with values that are supplied on the installation media.

IBM also recommends that you first create a data area to specify your system time zone before you upgrade to V5R4. This data area is used when you upgrade to set the time zone system value. By doing this, the time zone used on the system is set immediately.

• Recording and printing all system values before you install software
  IBM recommends that you record or print your system values prior to the upgrade.
• Changing certain system values (QSYSLIBL, QUSRLIBL, QALWOBJRST, or QVFYOBJRST)
  To ensure that your installation runs smoothly, check the system library list (QSYSLIBL), user library list (QUSRLIBL), allow restore of security sensitive objects (QALWOBJRST), and verify object signatures during restore (QVFYOBJRST) system values.
• Optionally changing the scan control system value
  If you currently have V5R3 or later installed on your system, consider specifying *NOPOSTRST for the scan control (QSCANFSCTL) system value.
• Creating a data area to specify the system time zone
  IBM recommends that you specify the system time zone before you upgrade to the new release. This ensures that your system time is set properly as soon as the upgrade is complete.