Red Hat GLOBAL FILE SYSTEM 5.0, Administrator'S Manual

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Figure 2.2. Extent Mapping
The physical volumes that make up a logical volume do not have to be the same size.
Figure 2.3, “Linear Volume with Unequal Physical Volumes” shows volume group
VG1
with a
physical extent size of 4MB. This volume group includes 2 physical volumes named
PV1
and
PV2
. The physical volumes are divided into 4MB units, since that is the extent size. In this
example,
PV1
is 100 extents in size (400MB) and
PV2
is 200 extents in size (800MB). You can
create a linear volume any size between 1 and 300 extents (4MB to 1200MB). In this example,
the linear volume named
LV1
is 300 extents in size.
Chapter 2. LVM Components
10