Netapp SnapVault is a heterogeneous disk-to-disk backup solution for Netapp filers and systems with other OS (Solaris, HP-UX, AIX, Windows, and Linux). In event of data loss or corruption on a filer, backed up data can be restored from the SnapVault secondary storage system with less downtime and less of the uncertainty associated with conventional tape backup and restore operations.
About Snapvault : http://www.netapp.com/us/products/protection-software/snapvault.html
Open systems snapvault : http://www.netapp.com/us/products/protection-software/ossv.html
Presentation on Snapvault features : http://www-download.netapp.com/edm/TT/WOD/WOD20070222/index.html