Wednesday, February 24, 2010

Installing MSSQL 2000 instance on top of MSSQL 2005

I experienced the issue of installing a SQL 2000 instance on top of an existing installation of SQL 2005. Having had the same frustration of not being able to see the 2000 instance remotely I searched and found this article. " must install SQL 2000 SP4 before 2005" on an article gave me a bit of a panic, but is a hint as to the solution.

SQL 2005 requires that you select "Allow remote connections to access this computer" on the Connections tab of server properties. It also requires that the "SQL Server Browser" service is running.

I checked these and found that installing the SQL 2000 had disabled the "SQL Server Browser" service. Restarting this service allowed remote connection to both the sql Server 2000 and 2005 instances.

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