HP Tru64 UNIX and TruCluster Server Version 5.1B-5 Patch Summary and Release Notes (March 2009)

2.2.3.7 Enabling the Version Switch After Installation
Some patches require you to run the versw -switch command to enable the new
functions delivered in those patches. (See the Patch Kit Installation Instructions for
information about version switches.) Enter the command as follows after dupatch has
completed the installation process:
# versw -switch
The new functionality will not be available until after you reboot your system. You do
not have to run the versw -switch command, but if you do not, your system will
not be able to access the functionality provided in the version-switch patches.
2.2.3.8 Script Required to Reverse Version Switch
If you enabled version switches as described in the section titled “Enabling the Version
Switch After Installation”, you must run the /usr/sbin/versw_enable_delete
script before attempting to remove Version 5.1B-4 or higher. The steps for running this
script require a complete cluster or single system shutdown, so choose a time when a
shutdown will have the least impact on your operations. The following steps describe
the procedure:
1. Make sure that all phases of the installation process have been completed.
2. Run the /usr/sbin/versw_enable_delete script:
# /usr/sbin/versw_enable_delete
3. Shut down the entire cluster or the single system.
4. Reboot the entire cluster or the single system.
5. Run dupatch on your single system or on a cluster using the rolling upgrade
procedure to delete Version 5.1B-4 or higher (as described in the Patch Kit Installation
Instructions), up to the point where the kernel is rebuilt and the system must be
booted.
6. Reboot the single system or each member of the cluster.
NOTE: This step requires that you reboot each cluster member to remove Version
5.1B-4 or higher. Because the no-roll procedure automatically reboots the system
after deleting the patches, you would not be able to perform this step as required.
2.2.3.9 Restriction on Using No-Roll Procedure to Remove Kit
The section titled “Script Must Be Run When Returning to Pre-Patched System”
describes actions you need to take before rebooting your system if removing this kit
would restore your system to a pro-patched state. Because the no-roll procedure
automatically boots your system, you cannot use that patch kit removal method if
doing so would restore your system to a pre-patched state
2.2 Important Kit Installation and Removal Release Notes 33