Prepare for the migration

Describes how to prepare to migrate your data to a new target server.

Before you begin this procedure, be sure you have completed these prerequisite tasks:

Obtain and review the preventive service planning (PSP) information. The PSP document for V5R3 data migrations is SF98167. Review this document for the most current information about conditions that could affect your data migration.
Plan the migration.

Then, to prepare to migrate your data, perform these tasks:

Prepare target server

Ensure that your console is set up and ready.
Note: If you are using a twinaxial console on the source server and using Operations Console on the target server, ensure that you have a twinaxial controller for any twinaxial devices you plan to run from the target server.
Verify that the target server is set up and is running with only the Licensed Internal Code and the operating system (i5/OS™) installed (feature code 0205).
If you are configuring a server with logical partitions, you must create logical partitions on the target server and then install the Licensed Internal Code and i5/OS on each secondary partition. Allow at least two additional hours to do this for each partition.
Perform disk unit management (for example, manage disk protection and disk configuration). To do this, you can use the Work with Disk Units option from the Dedicated Service Tools display. For more information, see the chapter that contains Procedures for configuring disks and disk protection in the Backup and Recovery Guide.

Prepare source server

Prepare to install the i5/OS release.
Ensure that you do the following:
- Use the Work with Line Descriptions command (WRKLIND) to view and delete unused lines and line descriptions.
- Use the Work with Device Descriptions command (WRKDEVD) to delete unused device descriptions.
  Note: You can use the Work with Line Descriptions and Work with Device Descriptions commands to view and verify that all of the descriptions listed are in use. If you are sure one is not in use, delete it. If you are not sure, you should leave it.
- Save the entire server so you can restore it to its original state after performing the data migration.
  Note: It is recommended that you have two copies of the backup media.
  
  Feature code 0205 entitles you to run the new operating system on both the source and target servers for a maximum of 70 days so that you can complete the data migration. When the data migration is complete, you must reinstall the previous operating system on the source server to restore the server to its original state. To restore the server to its original state, follow the steps in Recovering your server in Appendix C of the Backup and Recovery Guide. Use the Backup and Recovery Guide for the release that you want to restore.
Complete the installation of the i5/OS release.
Print your server configuration information as follows:
1. On the i5/OS command line, enter PRTSYSINF and then print the resulting spooled file. This prints reports of the hardware resources, software resources, system values, installed fixes (program temporary fixes or PTFs), and other configuration information.
2. Print a new system configuration list and keep this list for future reference.
3. On the i5/OS command line, enter WRKDEVD. Use option 6 (Print) to print the device descriptions.
4. On the i5/OS command line, enter WRKCTLD. Use option 6 (Print) to print the controller descriptions.
5. If you have a partitioned server, print the system configuration for logical partitions.

Stabilize the source server

Run the source server at the new release level for 2 weeks.
Save the entire server using option 21 of the GO SAVE command. Make sure that you specify the following options:
1. Vary off the network server...*ALL
2. Unmount file systems..........Y
Note: It is recommended that you have two copies of the backup media.

The next step is to Complete the migration.