Starting DBUA

If you install the Oracle Database software only and specify that you are upgrading an existing database to the new Oracle Database release, then DBUA is launched automatically after the software installation. You can then continue as described in "Upgrading a Database Using DBUA".

If you perform a software-only installation and do not upgrade your database at that time, then you can do so later by launching DBUA.

Be aware of the following before you begin using DBUA:

• You must run Net Configuration Assistant (NETCA) before running DBUA.

• It is not possible to upgrade a database with DBUA when the source and target Oracle homes are owned by different users.

• If the database instance is not running, then DBUA tries to start the instance with the default initialization parameter file. If that fails, then you are prompted to provide the name of the correct initialization parameter file or to start the instance. If the instance is up and running, then DBUA connects to it.

• If you stop the upgrade, but do not restore the database, then you should not restart DBUA until you start the database instance in UPGRADE mode using the Oracle Database 11g release 2 (11.2) software. You cannot go back to the original software version unless you restore your database.

• If you restore your database manually (not using DBUA), then remove the following file from the Oracle Database 11g release 2 (11.2) home directory before starting DBUA:

  $ Oracle_home/cfgtoollogs/dbua/logs/Welcome_SID.txt
  

  The presence of this file indicates to DBUA that this operation is a reattempt of a previous operation.

To start DBUA on Microsoft Windows:

1. Configure the operating system environment variables, as described in "Configuring the Operating System Environment Variables".

2. Click Start, then select Programs (or All Programs)

3. Select Oracle - HOME_NAME

4. Select Configuration and Migration Tools

5. Select Database Upgrade Assistant

   The Database Upgrade Assistant: Welcome window appears.

To start DBUA on any supported platform:

1. Open a command window.

2. Configure the operating system environment variables, as described in "Configuring the Operating System Environment Variables".

3. Enter the following command:

   dbua
   

   The Database Upgrade Assistant: Welcome window appears.

   Note: The dbua executable is typically found in your Oracle_home/bin directory.