Version 7.6 supports both Oracle 8i and 9i. If you are upgrading to 7.6 using Oracle 9i, you can upgrade using a single byte or multibyte database for Datastream 7i.
If you plan to upgrade to 7.6 using an Oracle 9i multibyte database from 7.5.1.1 using an Oracle 8i single byte database, you must migrate your 7.5.1.1 schema to an Oracle 9i multibyte database before running the upgrade.
If you are upgrading to 7.6 using an Oracle 8i or an Oracle 9i single byte database, you do not have to migrate the database, and you can skip to Upgrading from 7.5.1.1 to 7.6.