After installing Windows Small Business Server 2011 (SBS 2011) you will want to configure the backups to keep your client’s data safe. My normal procedure is to have two External USB Hard Drives that I will add to the backup schedule and then swap them on a weekly basis. The one hard drive goes offsite and the other one stay connected for the week’s backup.

You will find that adding the first External Backup Drive to the backup schedule as a backup destination is a very smooth process, the way it should be. When you want to add the second drive you might get one of the following errors:

“The filename, directory name, or volume label syntax is incorrect”


“The server cannot configure the backup schedule. Please try again.”


SBS 2011 Windows Server Backup: Can’t add second Destination Backup Drive











SBS 2011 Windows Server Backup: Can’t add second Destination Backup Drive










This issue is related to a SBS 2011 bug that forces you to have both Destination Drives connected to the server when you configure your Windows Server Backup Schedule.

You can read this article Knowledge Base KB2009365 for the full solutions, but I jumped straight to Option 3 on the article because I didn’t have both drives with me at the time.

Here is the solution that worked for me:

  • Open an elevated Command Prompt (Administrative Rights) and run the following command to determine the Disk Identifier of the Destination Drive you want to add.

Wbadmin get disks

  • The output will provide you with a list of all the drives available on your server. Go through the list and make a note of the Disk Identifier number

Disk Identifier: {xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}

wbadmin get disks output

  • In the Command prompt, run the following command. This will add the new disk to your Windows Server Backup Schedule. Use the Disk Identifier that you noted above as the “AddTarget” parameter.

Wbadmin enable backup –addtarget:{xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}

wbadmin addtarget output

  • Follow the prompts and type “Y” for yes when asked “Do you want to enable scheduled backups with the above settings?”

That’s it, your new Windows Server Backup Destination Drive should be added to the Backup Schedule and you can go ahead and run the backups.

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