Windows 2003 has a Built-In Backup program called NTBACKUP which you can use to backup your Windows environment and when you had installed Exchange 2003 on this system, NTBACKUP is enhanced to allow backups of your Exchange Server databases.
- Local and remote backup of data
- Exchange Backup ready
- Scheduled Backups
- Volume Shadow Copy support
Integration with Removable Storgae from Windows 2003
How do you enhance NTBACKUP with the capability to Backup Exchange 2003 without installing Exchange Server?
You must install the Exchange System Manager on the Backup Server to backup Exchange Server. It is possible to backup the Exchange Server without Exchange System Manager with the following trick:
Copy ESEBCLI2.DLL from the Exchange 2003 CD into the EXCHSRVR\BIN folder
Add the following registry key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\BackupRestore\DLLPaths – REG_EXPAND_SZ – esebcli2 – c:\exchsrvr\bin\esebcli2.dll.
After modifying the registry you can use NTBACKUP to backup the remote Exchange Server by clicking – Tools –Remote Store.
Online or Offline Backup?
It is possible to Backup Exchange Online or Offline. The recommended method is to Backup the Exchange Server Online. An online backup can backup the Exchange Server databases without the interruption of Exchange services.
An offline backup is a simple copy of the Exchange database files. The Exchange Information store must be stopped before NTBACKUP can be used to Backup your Information store.
Volume Shadow Copy
Beginning with Exchange 2003 it is possible to do Exchange 2003 Volume Shadows Copy backups with 3rd party Backup applications, but not with the built-in Windows Server 2003 NTBACKUP utility.
The Volume Shadow Copy service coordinates its communication between Requestors (backup applications), Writers(applications like Exchange Server 2003), and Providers (software or hardware components that create the shadow copies). To use the Volume Shadow Copy service to backup Exchange Server 2003, the backup program must include an Exchange Server 2003 aware Volume Shadow Copy service requestor. Because the NTBACKUP program has no such requestor, organizations must use third-party backup applications or implement Exchange 2003 SP1 in its organization.
- Minimum selection is the storage group (SG) to truncate log files
VSC can create a Snapshot from multiple SG at the same time
- You can choose the entire storage group or a single database or multiple databases from a single SG
- Exchange 2003 RTM supports full backups and copy backups
All databases must be mounted to purge logfiles
To start the Backup process click Start – Run – NTBACKUP.
Figure 1: Start the Backup process
During an online backup, the .edb, .stm, and .log files that comprise the Exchange store are being backed up and checked for corruption. The Exchange database store is checked for corruption at file system level. File system level damage may be caused by unreliable hardware, firmware, or disks. This check is done by verifying the checksums on each 4 KB block or page in the database. If there is a checksum failure, backup will terminate (Exchange will not allow you to back up an Exchange store with a wrong checksum in it). This is tpyical for the 1018 error.
Choose a place to save the Backup files.
Figure 2: Choose a Backup device
It is possible to disable Volume Shadow Copy.
Figure 3: NTBACKUP options
The Backup process will begin.
Figure 4: The running NTBACKUP process
You can see the status of your Exchange Backups when you start the event viewer and select the application log.
Figure 5: NTBACKUP status in the event log
Transaction Log files and NTBACKUP
What to Backup
Backs up selected files and marks each file as backed up
Backup Logfiles and delete Transaction Logfiles
Backs up selected files, but does not mark any as backed up
Backup Logfiles but doesn’t deleteTransaction Logfiles
Backs up selected files only if they were created or modified since the previous backup
Backup only Logfiles but cannot be used with enabled circular logging
Backs up selected files only if they were created or modified since the previous backup, but does not mark them as backed up
Backup only Logfiles but cannot be used with enabled circular logging. Logfiles willnot be deleted after Backup
The type of Backup depends on the configuration of circular logging. You can specify circular logging settings at the Exchange Storage Group level.
Figure 6: Circular Logging settings
After a succesful Backup it is possible to do an Exchange Server restore in case of emergency.
You must ensure that the Exchange database store to restore is not mounted. You can dismount a Exchange Database Store in the Exchange System Manager by right clicking the database.
Start the NTBACKUP program and select Restore and Manage Media.
Figure 7: NTBACKUP restore process
In the following screen you must select the Server to restore the data, a temporary location for log and patch files (this directory must be empty).
Click Last Restore Set when this is the last restore device (this is also possible with ESEUTIL)
Click Mount Database after Restore if you want to automatically start the restored database.
Figure 8: restore options
Depending on the size of the database, the restore process can be very time consuming.
Figure 9: Restore Progress
You can read the Logfile after an successful or unsuccessful Exchange restore.
Figure 10: NTBACKUP Logfile
The following screenshots shows the Exchange Server MDBDATA directory. As you can see, there are now more Exchange Server Transcation Logfiles except the actual logfile.
Figure 11: NTBACKUP Logfile
The Built-in Windows 2003 NTBACKUP program is suitable for small and medium sized Exchange organizations which don’t want to buy an expensive Third Party Backup program.
Exchange Server 2003 data backup and Volume Shadow Copy services