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Fedora 14 is the latest update to the Red Hat-sponsored, Linux distribution. It is one of a handful of Linux distributions that use LVM, the Linux Logical Volume Manager, as the default disk partitioning scheme. The installer creates three logical volumes by default, besides the non-LVM /boot partition.
LVM (Logical Volume Manager) is a great piece of software which allow you to deal with Logical Volumes. Using LVM along with ext3 filesystem, you are allowed to extend the size of your logical drives which is pretty handy when running out of space.
Fedora 13 is one of the Linux distributions that supports and uses Linux Logical Volume Manager (LVM) as the default disk partitioning scheme. While this is a good thing (it has its benefits), the space allocation to the partitions and logical volumes is not optimal.
A partition is a means of dividing the storage capacity of a device, such as a hard disk, into several parts which can then be treated as separate storage devices (“logical devices”).
In this test procedure, first we create a new partition (/dev/hda2) using un-partitioned disk space. A new volume group (TestVG) and logical volume (TestLV) are then created using a physical volume created on the partition. An ext3 filesystem is then created on the logical volume, it is checked, and then mounted.
For partitions created on Logical Volume Manager (LVM) (Linux feature) at install time, they can be resized easily by concatenating extents onto them or truncating extents from them over multiple storage devices without major system reconfiguration.
These days most distributions are very easy to use and (for better or worse) abstract away the complex and powerful system underneath. This makes it easier to use but as a result, users often know little about the underlying system. Today we are going to take a look at Logical Volume Management (LVM), which gives users the ability to re-size partitions on the fly.
Some people have a need for storing data securely. Sometimes this means not only redundant disks (and a good backup strategy) but also encryption. Fortunately, the Linux kernel has all the features to use multiple RAID devices, pool them to a Logical Volume, and encrypt every block of the filesystem. Just don't forget your passphrase!
