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

• The patch kit you want to remove was installed before the NHD kit.
For example, if you installed Patch Kit 2 and then installed NHD-7, you cannot remove that
patch kit. However, if you later installed Patch Kit 4, you can remove that patch kit.
• The patch kit was installed with NHD-7.
Beginning with the release of Patch Kit 3, patch kits were incorporated into the NHD-7 kits.
As a result, when you installed NHD-7, you automatically installed the current patch kit.
These patch kits cannot be removed. However, you can remove any subsequent patch kits.
For example, if you installed NHD-7 with Patch Kit 4 and later installed Patch Kit 5, you
cannot remove Patch Kit 4, but can remove Patch Kit 5.
If you must remove the patch kit, the only solution is to rebuild your system environment by
reinstalling the Version 5.1B operating system and then restoring your system to its state before
you installed NHD-7 with the unwanted patch kit.
Do Not Install Prior NHD Kits on a Patched System
Do not install the NHD–5 or NHD–6 kits on your TruCluster system if you have installed this
patch kit or earlier patch kits. Doing so may cause an incorrect system configuration. The
installation code for these new hardware delivery kits does not correctly preserve some cluster
subset files.
Changes to System May Need to Be Reversed
If you made the following changes to your system after installing this patch kit, you will have
to undo those changes before you can uninstall it:
• If you changed your hardware configuration (for example, by adding a new disk), the system
configuration that existed prior to installing this patch kit might not recognize the new
devices or may not provide the necessary support for them.
• If you added new cluster members, the new members will not have an older state to revert
to if you attempt to uninstall this patch kit.
To uninstall this kit, do the following:
1. Remove all new hardware and new cluster members that you added after installing this kit.
2. Run dupatch to uninstall the patch kit.
3. Verify that the patch kit was successfully uninstalled.
You can now add the cluster members you removed and reinstall the hardware you removed,
as long as the support for it existed in the pre-patched system. You can also reinstall the patch
kit.
Script Required When Returning to Pre-Patched System
If removing this patch kit restores your system to a pre-patched state, you must run the script
/etc/dn_fix_dat.sh before rebooting your system during the patch-deletion process.
This situation occurs if Version 5.1B-2 or higher is the only Tru64 UNIX patch kit installed on
the 5.1B system.
Note:
Because the no-roll procedure automatically reboots the system after deleting the patches, you
cannot use this method to delete this patch kit if doing so returns your system to a pre-patched
state.
Failing to run this script will result in your system being unable to boot normally. If this occurs,
do the following:
1. Boot your system in single-user mode:
20 Patch Process Overview