HP Tru64 UNIX Version 5.1B-2 and Higher Patch Kit Installation Instructions (March 2009)

With Inclusive Patch Kits you must remove the entire kit rather than individual patches. However,
once you have removed any Inclusive Patch Kits installed on your system, you can then remove
individual patches from earlier kits.
To do this, dupatch recognizes the type of kit you have installed. When you select the patch
deletion menu, dupatch lists the most current Inclusive Patch Kit installed on your system as
well as any customer-specific patches (CSPs) that depend upon that kit.
After you remove that kit and reboot your system, you can rerun dupatch to remove the next
most current Inclusive Patch Kit and the CSPs that depend on it.
Once all inclusive patch kits have been removed, the next time you run the patch deletion program,
dupatch will list all of the patches on your system and you can selectively remove any of those
patches.
Caution:
With the old-style patch kits, the Patch Deletion menu lists every setld-based patch on your
system, regardless of which patch kit installed them. If you select the ALL of the above menu
item, it will remove all setld-based patches from your system. Therefore, you want to remove
all of the patches from a patch kit, but do not want to delete setld-based patches, you will have
to specify the patch ID of all of that kit's patches.
The latest version of dupatch also gives you the option to delete patches in single-user mode
or in multi-user mode. As with the installation process, using single-user mode is safer and is
the recommended procedure. See “When Single-User Mode Is Recommended” for more
information.
The dupatch utility issues the following warning when you are deleting patches in multi-user
mode.
*** Multi-User Deletion Warning ***
You have chosen to delete patches from this system while it is running in
Multi-User mode. Some patches may directly affect core operating system
operations. To ensure the proper operation of all applications, it is
strongly suggested that you delete these patches while the system is in
Single-User mode. If this cannot be done, delete these patches when the
system is as lightly loaded as possible (i.e. not running production
environments, no users logged on, etc.).
Do you want to continue? (y/n):
If you want to continue, answer yes. If you do not want to delete the patch kit in multi-user
mode, answer no and bring your system down to single-user mode as described in “Installing
Patches from Single-User Mode”.
Important Tasks Required Before Removing Patches and Rebooting System
Before running the patch deletion process you may have to perform the tasks described in the
following sections.
Run Mandatory Script Before Removing New Style Patch Kits
If you enabled version switches as described in “Enabling the Version Switch After Installing a
New Style Patch Kit” for an Inclusive Patch Kit, you must run the
/usr/sbin/versw_enable_delete script before attempting to remove the patch kit. 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 patch kit installation process have been completed.
2. Run /usr/sbin/versw_enable_delete:
Removing Patches 41