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MDAC 2.6 or later should not be installed on SQL Server 7.0 clusters
Article ID: 820754 - View products that this article applies to.
Do not install Microsoft Data Access Components (MDAC) 2.6 or later on any SQL Server 7.0 clustered nodes. If you install MDAC 2.6 or later on any node in the cluster, directly or through the installation of another program, it may cause a catastrophic failure of the SQL Server Agent or other SQL Server services.
To resolve this problem, you must recover your SQL Server computer. To do so, use one of the following methods. These methods are listed in the order of preference.
Note This issue can occur when Veritas' Backup Exec 9.0 for Windows Servers is installed on SQL Server 7.0 Clusters. For more information, see the Veritas Technote that is available at the following website:
http://seer.support.veritas.com/docs/258144.htmThe third-party products that are discussed in this article are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.