Using Linux for Windows HD Snapshots?

DBordello asks: "Our company is currently backing up weekly to tape. I would like to begin taking snapshots of our NT 4.0 server. My first thought was a Linux box running an Open Source solution. My research shows that most Open Source applications to take snapshots assume that the backup target is Linux based. This presents a problem with mounting the NT 4.0 server. While I could mount the share with Samba, all of the backup applications do not provide options to backup a local mount. What do you guys use to snapshot your Windows network?"