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Migrating and upgradingYou can upgrade to the 14.10 release of HCL Informix® or migrate from other database servers to Informix®. Upgrading is an in-place migration method that uses your existing hardware and operating system software. Some changes to the Informix® database server can affect upgrading from a previous release.
Migrating Informix® database systemsThe Informix® Migration Guide describes how to move data manually between databases, servers, and computers.
Migration to and reversion from 14.10
Reverting from Informix® Version 14.10You can revert to the version of the database server from which you migrated. When you run the reversion utility, you specify the target server for reversion and then Informix® checks your database. If necessary, Informix® might tell you to drop new objects, before automatically converting your data into the target server.
Reverting from Informix® Version 14.10After preparing to revert, run the reversion utility and prepare to use the original database server.
Back up the database server after reversionAfter you complete the reversion, use ON-Bar or ontape to make a level-0 backup of the database server to which you reverted.

Back up the database server after reversion

After you complete the reversion, use ON-Bar or ontape to make a level-0 backup of the database server to which you reverted.

For more information about making backups, see your Informix® Backup and Restore Guide.

Important: Do not overwrite the tapes that you used to back up your source database server.

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