You can install the CommServe software using a different SQL Server instance name.
Before You Begin
If the data/configuration information of an existing CommServe component should be retained, these steps should be done first:
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Back up the all user databases on the CommServe host
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Uninstall all Commvault software products
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Uninstall the existing SQL instance.
Procedure
Use native SQL backup tools to create several backup copies of each user database and keep at least one copy in a secure place. Prior to installing the new SQL Server instance, create a registry value containing the new SQL Instance name. Use the following steps to configure the szUserSQLInstanceName registry key:
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Log on to the computer as an Administrator or as a member of the Administrator group.
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Click the Windows Start button and then click Run.
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Type regedit and then click OK to open the Registry Editor window.
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Navigate to HKEY_LOCAL_MACHINE > SOFTWARE > GalaxyInstallerFlags . If the key does not exist, create it.
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Right click the GalaxyInstallerFlags key and select New > String Value.
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Specify the Value name as szUserSQLInstanceName.
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Double click szUserSQLInstanceName and in the Value data box, type the name of the SQL instance to use. Click OK.
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Close the Registry Editor window.