Physical partitions

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When you add a physical volume to a volume group, the physical volume is partitioned into contiguous, equal-sized units of space called physical partitions. A physical partition is the smallest unit of storage space allocation and is a contiguous space on a physical volume.

Physical volumes inherit the volume group's physical partition size, which you can set only when you create the volume group (for example, using the mkvg -s command). The following illustration shows the relationship between physical partitions on physical volumes and volume groups.

Figure 1. A Volume Group Containing Three Physical Volumes. This illustration shows three physical volumes, each with six physical partitions, within a single volume group.