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The information below applies only to Linux Hosting packages with MySQL 4 databases. MySQL 4 is being phased out and therefore any data held within a MySQL 4 database must be migrated into a new MySQL 5 database.
Why is the migration not done automatically?
The migration can not be carried out automatically because of some features of MySQL 4 are not supported in MySQL 5 and in order to minimize the amount of transmission and handling of your private data. Because of this we are allowing customers to carry out the migration on their own, at their leisure.
How do I know if my databases are affected?
Any database created in the 1&1 Control Panel that says MySQL 4 as the version, will need to be migrated to a newly created MySQL 5 database. You can check what version of MySQL your databases are by logging into your 1&1 Control Panel and clicking on MySQL Administration from the Domains & Web Space section.
A better approach would have been to identify customers with active MySQL 4 databases and proactively offer to assist them in the transition.