Release Notes for DB2 Version 9.1 for Linux, UNIX and Windows

Release Notes list useful information for when you are preparing to install a fix pack.

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A fix pack is a cumulative collection of APAR fixes. It includes APAR fixes that have not been previously released and it spans multiple database products. In general, fix packs can be applied on top of any previously shipped maintenance to bring the system up to the current fix pack level.

For an overview of what's new in a particular fix pack, refer to the "What's New" documents in the Product Overviews section of the documentation:

Particularly relevant to product installation, migration, usage, and troubleshooting are the topics on product packaging, terminology, and changed, deprecated, and discontinued functionality.

Update history

For a list of the APARs contained in each fix pack, refer to:

Backward compatibility

For a list of the DB2® Version 9.1 incompatibilities with previous releases, refer to:

For a list of deprecated and discontinued features, refer to:

System requirements

For a list of the DB2 Version 9.1 system requirements, refer to:

For a list of the DB2 Connect™ Version 9.1 system requirements, refer to:

Getting started

The instructions for how to install a fix pack previously resided in a fix pack readme. They are now found within the information center. Refer to:

If you are migrating from an earlier version of DB2, additional information can be found in the DB2 database system migration portal:

Updates, limitations and known problems

The DB2 Version 9.1 documentation is updated periodically. To review the list of enhancements that have been made to the documentation, refer to:

If you use a local copy of the information, you can download the documentation updates. Refer to:

Limitations and known problems for DB2 database products are documented in:
As limitations and problems are discovered and resolved, this content is updated. By searching these sources of information, you can quickly find workarounds or solutions to problems that you experience. The following links launch customized queries of the technotes and APARs: To create your own query, go o the Advanced search page on the IBM Software Support Web site:

Contacting IBM Software Support

IBM Software Support provides assistance with product defects. For information about how to contact IBM Software Support, refer to:


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