Question

When I run this statement in SQL Server:

USE [master]
GO
ALTER DATABASE <DBName> ADD FILEGROUP <[FGName]>

Where is the corresponding .ndf file created on disk?

When I run that query, it’s successful and I am able to find the new file group being added to the sys.filegroups table.

But when I run

select * from sys.database_files 

I am not able to find the files created for the new file group. I couldn’t find it in the disk as well. What am I doing wrong?

Could somebody help with this..?

Answer 1

Try this:

In SQL Server you will have to explicitly add the .ndf files to the different filegroups. If you dont mention any filegroup then by default it will be added to primary filegroup.

So whenever you add a filegroup it is just a logical name and it does not have any physical location.

use yourDBname
select * from sys.database_files 

ALTER DATABASE yourDBname ADD FILE (NAME = name1, FILENAME = 'C:\Program Files\Microsoft SQL Server\MSSQL10_50.MSSQLSERVER\MSSQL\DATA\DB11.ndf', SIZE=100MB, MAXSIZE=500GB, FILEGROWTH=50);
ALTER DATABASE yourDBname ADD FILEGROUP BusyTables

select * from sys.database_files