Changes

LVM provides a flexible and high level approach to managing disk space. Instead of each disk drive being split into partitions of fixed sizes onto which fixed size are in turn file systems are created, LVM provides a way to group together disk space into logical volumes which can be easily resized and moved. In addition LVM allows administrators to carefully control disk space assigned to different groups of users by allocating distinct volume groups or logical volumes to those users. When the space initially allocated to the volume is exhausted the administrator can simply add more space without having to move the user files to a different file system.

As we can see the in the above example, vg_kvmfed11 has a physical extend size of 4.00MB and has a total of 7.80GB available for allocation to logical volumes. Currently 1997 physical extents are allocated equalling equaling the total 7.80GB capacity. If we want to increase the space allocated to any logical volumes in vg_kvmfed11 we will need to add one or more physical volumes.

Just as with the previous steps to gatehr gather information about the current Logical Volume Management configuration of a Fedora system, changing this configuration can be performed both from the command line and from within the graphical volume management tool. In this section we will focus on the use of command line tools.