I installed SQL Server 2012 Enterprise SP1 on Windows Server 2012 using mount points X:\user_data, X:\user_log, X:\system and X:\tempdb as my default locations and used integrated security (NT SERVICE\MSSQLSERVER).
The users want to keep some new configuration databases on separate mount points (X:\cfg_data, X:\cfg_log) however when I try to create the databases (my AD group is the instance sysadmin and Windows Administrator group member) I received OS error 5(Access is denied). D'oh! Okay, in Windows I added NT SERVICE\MSSQLSERVER to the mount point security with Full Control with no joy. I rebooted the server, still no joy.
The ONLY way to get this to work is to add NT SERVICE\MSSQLSERVER to the Windows Administrators group which is not a proper security configuration, though it does give me hope that there is authority somewhere to something granted to someone needed.
If you have any ideas or experience, I would greatly appreciate your input :-)
Thank you.