The LVM has been for many years the way to manage disk growth, and allowing logical volumes to span over multiple disks and support backing up through the use of snapshots. LVMs, although very good, still require a filesystem to sit on top of the logical volume and hence, incur an extra level of management; bearing in mind that the LVM system itself has three levels of management:
Physical volumes: These are the disk space made available to the LVM system
Volume groups: These organize the physical volumes to be made available to the consumer
Logical volumes: These consume the disk space made available via the volume groups and are presented to the filesystem tools to be formatted
Now just because we have used such software for the last 10 years or so does not give it the right to continue unchallenged, even within the enterprise. We now see B-tree filesystem (BTRFS) pronounced as Better FS making inroads in Linux. BTRFS is available on version 0.20 to install...