Next Previous Contents 3. Ok, don't let this scare you off, but LVM comes with a lot of jargon which you should understand lest you endanger your filesystems. We start at the bottom, more or less. The physical media You should take the word 'physical' with a grain of salt, though we will initially assume it to be a simple hard disk, or a partition.
Physical Extents are like really big blocks, often with a size of megabytes.
Yes, we're finally getting somewhere. A Logical Volume is the end result of our work, and it's there that we store our information. This is equivalent to the historic idea of partitions. To the linux kernel, there is no difference between a regular partition and a Logical Volume. This shows us two filesystems, spanning two disks.