Chapter 3 Backing Out the Solaris 9 Maintenance Update 3

If you need to remove one of the patches, you can do so. However, you must not have used the -d option of install_mu during the installation of the Solaris 9 MU3 software.

Instructions for backing out individual patches are located in each patch directory. Patch directories are located in /var/sadm/patch/.

Backing out the entire MU is not possible if you selected the -d option of install_mu.

Backing Out the Solaris 9 MU3

Ideally, you reboot your system in single-user mode before backing out the MU3. MU3 applies patches to system libraries. Avoid introducing instability to individual systems in a multiuser system. Ensure that no processes have mapped to a patched version of a library. Otherwise, those processes might later attempt to map to different sections of the old library.

In single-user mode, network services are not available. You must copy the MU3 image from the network to your local system before booting your system in single-user mode.

You need to back out MU3 by using NFS in multiuser mode if you meet one of the following conditions:

• You cannot reboot the system in single-user mode

• You do not have enough disk space to make a local copy of the MU3 image

The backout_mu script that is provided by MU3 enables you to back out an entire MU.

To back out the Solaris 9 MU3 software:

1. Ensure that no important user or important system processes are running.

2. Exit the current session.

   The CDE login screen is displayed.

3. Click the Options button and select Command Line Login.

   The system prompts you to log in.

4. Type your login name as root and type the root password:

   login: root password: root password

5. Reboot in single-user mode. From the root shell prompt, type:

   # reboot -- -s

6. Type the root password.

   Check that the system displays the following message and is now in system maintenance mode.

   Entering System Maintenance Mode Sun Microsystems Inc. SunOS 5.9 Generic May 2002 #

7. Run backout_mu. From a local copy of the MU3 image, type:

   # cd local_directory # ./backout_mu options

   Table 3–1 Command-Line Options for backout_mu

   Option	Description
   -q	Disables the display of dots that indicate backout_mu activity
   -B backoutdir	Specifies an alternate directory for storing the information that is required to back out a patch

8. When the backout is complete, check that the following message is displayed.

   backout_mu completed at date_time.

   • If you see this message, go to Step 9 to complete the backout.

   • If you encounter any errors, go to Chapter 5, Error Messages.

9. Reboot the system by typing:

   # sync ; reboot

   You are then prompted for a login.

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   Note –

   To prevent the library conflict problem, you must reboot your system after backing out MU3.

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10. Type your login name and password:

    login: login password: password