SQL Server VSS Writer, Hyper-V and SQL Server 2008 backups

Can e.g. the snapshots be configured to be "copy-only" so that they don't mess up the normal backups?

Yes, Windows Server Backup allows to choose between these two options:

  • VSS full backup
  • VSS copy backup

Choosing "VSS copy backup" should leave your SQL Server backups intact.

This tech community article explains the setting.

If you're using the configuration wizard for your Windows Server Backup, the setting is availabe during the step "Select items for Backup". Click the button "Advanced Settings" and then switch to the tab "VSS settings".

This blog entry has a few screenshots.