Have you ever encountered a situation where you were unable to start the SQL Server service? It can be frustrating, especially if you’re new to SQL Server and don’t know where to look for the cause of the failure.

In this blog post, we will explore a common issue that can lead to SQL Server startup failure and discuss a possible solution.

The Error Log

When SQL Server fails to start, one of the first places you should look for clues is the SQL Server Error Log. This log file contains valuable information about the startup process and any errors encountered along the way.

One of the common error messages you might come across is “SNIInitialize() failed with error 0x2.” This error code translates to “The system cannot find the file specified” in Windows. This error can also be observed when attempting to start the SQL Server service using the services.msc tool.

Registry Key Issue

To investigate further, you can use a tool like Process Monitor to capture registry access while starting the SQL Server service. By analyzing the captured data, you may discover that SQL Server is looking for a key called “ClusterName” in the registry, which is missing.

In cases where SQL Server is running as a standalone instance, the “Cluster” key should not exist in the registry. To resolve this issue, you can take a backup of the registry and delete the “Cluster” key.

The exact path of the registry key may vary depending on the version and instance name of your SQL Server. For example, for SQL Server 2017 with the default instance, the path would be:

HKLM\SOFTWARE\Microsoft\Microsoft SQL Server\MSSQL14.MSSQLSERVER\Cluster

It’s important to note that the path will change based on the SQL Server version and instance name. Here is a list of SQL Server versions and their respective registry key prefixes:

• SQL Server 2008: MSSQL10
• SQL Server 2008 R2: MSSQL10_50
• SQL Server 2012: MSSQL11
• SQL Server 2014: MSSQL12
• SQL Server 2016: MSSQL13
• SQL Server 2017: MSSQL14

By appending the instance name (e.g., MSSQLSERVER for the default instance), you can construct the complete registry key.

We hope this blog post helps you understand and resolve SQL Server startup failures caused by missing registry keys. If you ever encounter a similar issue, remember to check the SQL Server Error Log and investigate the registry for any missing keys.

Thank you for reading!