ZRM takes advantage of filesystem and storage volume snapshots when performing raw backups. Snapshots capture changes to your data at a given point in time without having to copy the entire filesystem or volume. As noted in the Plugin Framework section above, ZRM supports filesystem snapshots for NetApp SnapManager, Solaris ZFS, Veritas VxFS, as well as storage volume snapshots for Linux LVM, Windows VSS, and EMC CLARiiON SnapView.