Yes - Depends on your budget
For SCO:-
Reliant HA is a significant high-availability product from SCO, providing sophisticated options for reliability and complex clustered configurations. Both systems offer unprecedented availability levels, and each has its own specialization
SCO Reliant HA http://www.caldera.com/products/clustering/rhadata/
If you are thinking of changing to linux then
Steeleye
SteelEye is a leading provider of data and application availability management solutions for business continuity and disaster recovery on Linux and Windows.
The SteelEye LifeKeeper family of application-focused data replication, high availability clustering and disaster recovery solutions are easy to deploy and operate, and enable enterprises of all sizes to ensure continuous availability of business-critical applications, servers and data. The solutions are proven in the most demanding of environments and are integrated to deliver flexibility, scalability and a fast return on investment.
SteelEye LifeKeeper offers enterprise-grade reliability while simplifying implementation with certified solutions for a wide range of applications and databases running on Windows and Linux, including mySAP, Exchange, Apache, Oracle, DB2, SQL Server, MySQL, PostgreSQL and others.
To complement its software solutions, SteelEye also provides a full range of high availability consulting and professional services to assist organizations with the assessment, design and implementation of solutions for ensuring High Availability within their environments.
For more information...
http://www.steeleye.com/
