Back up Informix® after migrating to the new version
Use a backup and restore tool (ON-Bar or ontape) to make a level-0 backup of the new database server. Do not overwrite the tapes that contain the final backup of the old database server.
For more information, see the HCL
Informix Backup and Restore Guide.
Important: Do not restore the backed up logical-log
files from your old database server for your new database server.