SQL Server Backup and Restore - Simple Talk

Chapter 9: File and Filegroup Backup and Restore
Common Filegroup Architectures
A filegroup is simply a logical collection of one or more database files. So far in this book,
our database creation statements have been very straightforward, and similar in layout to
the one shown in Listing 9-1.
CREATE DATABASE [FileBackupsTest] ON PRIMARY
( NAME = N'FileBackupsTest'
, FILENAME = N'C:\SQLData\FileBackupsTest.mdf'
) LOG ON
( NAME = N'FileBackupsTest_log'
, FILENAME = N'C:\SQLData\FileBackupsTest_log.ldf'
)
GO
Listing 9-1: A simple database file architecture.
In other words, a single data file in the PRIMARY filegroup, plus a log file (remember that
log files are entirely separate from data files; log files are never members of a filegroup).
However, as discussed in Chapter 1, it's common to create more than one data file per
filegroup, as shown in Listing 9-2.
CREATE DATABASE [FileBackupsTest] ON PRIMARY
( NAME = N'FileBackupsTest',
FILENAME = N'C:\SQLData\FileBackupsTest.mdf'),
( NAME = N'FileBackupsTest2',
FILENAME = N'D:\SQLData\FileBackupsTest2.ndf')
LOG ON
( NAME = N'FileBackupsTest_log',
FILENAME = N'E:\SQLData\FileBackupsTest_log.ldf'
)
GO
Listing 9-2: Two data files in the PRIMARY filegroup.
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