Topic Status: Some information in this topic is preview and subject to change in future releases. Preview information describes new features or changes to existing features in Microsoft SQL Server 2016 Community Technology Preview 2 (CTP2).
Check the error log for additional information about memory, disk space, or permission failure. Confirm the location of the .mdf and .ndf files for the affected database and confirm that the account used by the Database Engine has permission to access those files. After correcting the problem, restart the database by using ALTER DATABASE to set it ONLINE.