Release Notes for Version 5.1B-6 > Chapter 3 Release Notes   

Kit Removal Release Notes

The following sections describe actions you have to take if you decided to uninstall Version 5.1B-4 or higher. Read each section before running the patch deletion procedure.

Some Patch Kits Cannot Be Removed

You cannot remove a patch kit on systems that have the New Hardware Delivery–7 (NHD-7) kit installed when either of the following conditions exist:

  • 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.

Changes to System Might Need to Be Reversed

If you made the following changes to your system after installing this patch kit, you 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 might 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 prepatched system. You can also reinstall the patch kit.

Script Must Be Run When Returning to Prepatched System

If removing this patch kit restores your system to a prepatched state, you must run the /etc/dn_fix_dat.sh script 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 your 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 prepatched state.

Failing to run this script results in your system being unable to boot normally. If this occurs, do the following:

  1. Boot your system in single-user mode:

      >>> boot -fl s 
  2. Run the dn_fix_dat.sh script:

    # /etc/dn_fix_dat.sh
  3. Reboot normally.

If you also need to reverse the version switch as described in “Script Required to Reverse Version Switch”, run the /etc/dn_fix_dat.sh script after step 5 in that process.

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 prepatched state

NOTE: If during the dupatch installation and deletion processes you see a Special Instruction about running the /etc/dn_fix_dat.sh script, you should ignore that instruction unless your system meets the requirement described here.