首先了解主要的系统数据库：

除了以上四种，其实还有一个数据库：Resource

从2005就引入的，一个只读、隐藏的数据库，包含所有在sql server中的系统对象。由于SQL SERVER不支持备份还原Resource数据库。所以DBA需要复制Resource的mssqlsystemresource.mdf和mssqlsystemresource.ldf文件。

 SQL Server 2005 中的Resource数据库在路径： “<drive>:\Program Files\Microsoft SQL Server\MSSQL.1\MSSQL\Data\” location 

 SQL Server 2008 中的Resource数据库在路径： “<drive>:\Program Files\Microsoft SQL Server\MSSQL10.<instance_name>\MSSQL\Binn\” location.

报表服务数据库：如果装了报表服务，将会看到这两个服务数据库

ReportServer 
ReportServerTempDB 

Replication System Database（复制服务系统数据库）
distribution - 当配置了复制服务时，将会看到这个数据库。

如果需要执行基于文件的备份功能来备份Resource数据库，则需要开启XP_CmdShell

USE master
GO
sp_configure 'show advanced options'
GO
/* 0 = Disabled , 1 = Enabled */
sp_configure 'xp_cmdshell', 1
GO
RECONFIGURE WITH OVERRIDE
GO

USE master
GO
SELECT GETDATE() AS 'System Database Backup Start Time'
GO
/* Backup Distribution Database */ 
BACKUP DATABASE Distribution 
TO DISK = 'E:\SystemDatabaseBackups\Distribution.BAK' 
WITH INIT
GO
/* Backup ReportServer Database */ 
BACKUP DATABASE ReportServer 
TO DISK = 'E:\SystemDatabaseBackups\ReportServer.BAK' 
WITH INIT
GO
/* Backup ReportServerTempDB Database */ 
BACKUP DATABASE ReportServerTempDB 
TO DISK = 'E:\SystemDatabaseBackups\ReportServerTempDB.BAK' 
WITH INIT
GO
/* Backup Master Model */ 
BACKUP DATABASE Model 
TO DISK = 'E:\SystemDatabaseBackups\Model.BAK' 
WITH INIT
GO
/* Backup Master Database */ 
BACKUP DATABASE Master 
TO DISK = 'E:\SystemDatabaseBackups\Master.BAK' 
WITH INIT
GO
/* Backup Master MSDB */ 
BACKUP DATABASE MSDB 
TO DISK = 'E:\SystemDatabaseBackups\MSDB.BAK' 
WITH INIT
GO
/* Copy Resource Database Files Using XP_CMDSHELL */ 
EXEC xp_cmdshell 'COPY /Y "D:\Program Files\Microsoft SQL Server\MSSQL10.
SQL2008\MSSQL\Binn\mssqlsystemresource.mdf" "E:\SystemDatabaseBackups"' 
GO
EXEC xp_cmdshell 'COPY /Y "D:\Program Files\Microsoft SQL Server\MSSQL10.
SQL2008\MSSQL\Binn\mssqlsystemresource.ldf" "E:\SystemDatabaseBackups"'
GO
SELECT GETDATE() AS 'System Database Backup End Time'
GO