Way cool feature of zfs.”One of the most important things a user needs to do on a laptop is to back his data up. Copying your data to DVD or an external drive is one way. ZFS snapshots with ‘zfs send’ and ‘zfs recv’ is a better way. Due to its architecture, snaphots in ZFS are very fast and only take up as much space as much data has changed. For a typical user, taking a snapshot every day, for example, will only take up a small amount of capacity.” ZFS on a laptop?