What default file system does OpenSolaris 2008.05 use ?
ZFS is the default file system; this brings the benefits of using ZFS much closer to the average user, allowing them to get the advantages of ZFS right from the start. ZFS can snapshot the file system, allowing the user to easily revert changes, for example, if a you decide your current development experiment isn’t working and you would like to reset your entire system to a prior state. As another example, the user will easily be able to revert to an initial ‘factory install’, which may be useful in some kiosk situations.