Preparing for feature upgrade

Use this information to understand and complete the prerequisites for adding or replacing a hardware feature.

1. Install fixes (also known as program temporary fixes or PTFs) on all logical partitions of the server. Use the Install fixes on servers with logical partitions topic to install the fixes on the server before adding or replacing the hardware feature.
   Note: If you are performing a miscellaneous equipment specification (MES) processor upgrade for a 570 model, your server firmware and IBM® i partitions must be at a minimum level of code prior to your MES upgrade. To view the current level of code required for this upgrade, see IBM Prerequisite .
2. If you are replacing disk units, use the Disk migration while active option of the STRASPBAL (Start ASP Balance) command to reduce the downtime associated with removing a disk unit. With this option, you can move data from specified disk units while your server is running. For information, see STRASPBAL (Start ASP Balance) command .
3. See Printing the server configuration when changing a hardware feature.
4. Save the entire server on a tape drive that is compatible with the tape drive on the target server. For instructions about saving the server and logical partitions, see the Save your server and each logical partition using GO SAVE option 21 topic.
   Note: To determine if your tape drives are compatible, see IBM Prerequisite . If you are upgrading a partitioned server, ensure that you save all the data on the logical partitions. Saving this data is vital for recovery if you experience errors when you upgrade the server.