Windows 7 Backup is designed for use on a PC and therefore you cannot create a scheduled backup to run to multiple disks.

This may be a requirement where a PC is being used as a server and needs a backup configuration of more than 1 drive so that one can be kept offsite.

Work around:

The work around is to use the wbadmin start backup commands and a scheduled tasks.

What you need to do is :

• 1. Create a backup script
  • Open notepad
  • Use the commands in this link to create a one time backup task to run: https://technet.microsoft.com/en-us/library/cc742083(v=ws.11).aspx
  • For example: wbadmin start backup -backupTarget:\\?\Volume{********-****-****-****-***********} -include:C: -vssFull -quiet 
  • The above will run a full backup in the background to the disk with that volume name.
  • To get the volume name of the backup drive, open a command prompt and type: mountvol
  • Once you are happy with it save the script with an appropriate name followed by the extension .bat and change the save as type to 'All Files (*.*)' 
  • You will need to create a script per drive

• 2. Create a scheduled task
  • Go to Start -> All Programs -> Accessories -> System Tools -> Task Scheduler
  • In the new window that opens right click on Task scheduler Library and select 'Create Task'
  • On the General tab, give the task a name and description e.g. Back to Disk 1
  • Select 'Run whether user is logged in or not'
  • On the Triggers tab, click new, select on a schedule from the top drop down list
  • Select the appropriate schedule, if there are 2 drives and one week you want it to run everyday in week 1 to drive 1 then:
    • Select Weekly
    • Set the start date and time you want it to run
    • Set the recur every 2 weeks
    • Tick the days you want it to run, e.g. every week day.
  • Make sure enabled is ticked at the bottom
  • On the Actions tab, press new
  • Set the action as start program, browse to the script you have created above and press ok
  • Press ok again once done, you will need to give it the credentials of an admin user to run as.
  • You will need to create a task for each of the drives.

Use the 'Backup Windows Backup' Naverisk role to monitor this.