How to do it...
Starting out simple-ish, let's talk about ZFS.
Less of a traditional filesystem than others, ZFS has recently been mainstreamed on Linux by being bundled into Ubuntu (which caused a lot of arguing and even some claims that Canonical were willfully breaking GPL compliance), and it's causing a bit of a stir.
For years, ZFS was the main reason people installed FreeBSD (don't email me), and it's the backbone filesystem for systems based on Solaris or OpenSolaris. It works differently to XFS or ext4 and is arguably closer to the LVM world.
Disks are placed into VDEVs, which is the bit that handles the mirroring or RAID-ing of drives. These VDEVs then form the basis for zpools, which are storage pools that datasets then sit atop ...
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