Siebel Database Upgrade Guide for DB2 for z/OS > How to Perform a Siebel Database Upgrade > Roadmap for Performing a Siebel Database Upgrade >

Roadmap for Upgrading from Siebel 6.x, 7.0.x, and 7.5.2

You cannot upgrade directly to Siebel CRM version 8.1 from Siebel CRM versions earlier than 7.5.3. To upgrade to Siebel CRM version 8.1 from these releases, do the following:

• 7.0.x, 7.5.2 releases

  You cannot upgrade directly from Siebel CRM 7.0.x or Siebel CRM version 7.5.2 to Siebel CRM version 8.1; you must first upgrade to Siebel CRM versions 7.5.3, 7.7, 7. 8 or 8.0. To perform these upgrades, see the relevant version of Siebel Database Upgrade Guide for DB2 for z/OS.

• 6.x releases

  In general, direct upgrades from Siebel CRM Release 6.x to releases after Siebel CRM version 7.7 are not supported. You must first upgrade from Siebel CRM Release 6.x to Siebel CRM version 7.7. To upgrade from Siebel CRM Release 6.x to Siebel CRM version 7.7, see the latest Siebel 7.7 version of Siebel Database Upgrade Guide for DB2 for z/OS.

  On the DB2 for z/OS database platform, however, direct upgrades from Siebel CRM version 6.2.1 of Siebel Financial Services to Siebel CRM version 7.8 or Siebel CRM version 8.0 of Siebel Industry Applications are supported. To perform these upgrades, see the latest 7.8 or 8.0 version of Siebel Database Upgrade Guide for DB2 for z/OS.