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Unable to open physical file - Operating system error 5: 5(error not found) Microsoft SQL Server: Error 5120

I am trying to attach a database to SQL 2005. This database has not previously been attached. I have only just installed SQL.

I get the following message: Unable to open physical file "C:\ArrowSQL\Arr@Data\Arrow_data.mdf" Operating system error 5: "5(error not found)" (Microsoft SQL Server: Error 5120)".

I have loaded SQL and the database fiel and directory with the same user acccount which is a local adminstrator ont hsi machine. I have checked that I have read/write access to the file.

The machine runs Windows Vista Business. SQL has SP 2 loaded.
Use the below script to find the sql service account

Code Snippet
declare @sqlser varchar(20)
EXEC master..xp_regread @rootkey='HKEY_LOCAL_MACHINE',@key='SYSTEM\CurrentControlSet\Services\MSSQLSERVER',
@value_name='objectname', @value=@sqlser OUTPUT
PRINT 'Account Starting SQL Server Service:' +convert(varchar(30),@sqlser)

After getting the service account try the below steps to provide privilege

  • Right click on the folder C:\ArrowSQL\Arr@Data and click on properties
  • Click on security tab
  • Click on Add button and add sql service account
  • Provide modify privilege and click ok
  • Verify both mdf and ldf have modify privilege
  • Attach the db!


    You can also try the below alternate method to find service account

    • Goto RUN
    • Type services.msc & press enter
    • In service control manager find the below service w.r.t to your edition.
    For SQL 2000
    MSSQLSERVER -- for default instance
    MSSQL$instancename -- for named instance

    For SQL 2005 & SQL 2008
    SQL Server (MSSQLSERVER) -- for default instance
    SQL Server (instancename) -- for named instance
    • Check the "Log On as" for the SQL service and provide modify privilege to that ID in the folder.

For More Details, Click Here


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