Red Hat GLOBAL FILE SYSTEM 5.0, Administrator'S Manual

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mirror or mirrors. This log can be kept on disk, which will keep it persistent across reboots, or it
can be maintained in memory.
Figure 2.6, “Mirrored Logical Volume” shows a mirrored logical volume with one mirror. In this
configuration, the log is maintained on disk.
Figure 2.6. Mirrored Logical Volume
Note
Mirrored logical volumes are not currently supported in a cluster.
For information on creating and modifying mirrors, see Section 4.1.3, “Creating Mirrored
Volumes” .
3.4. Snapshot Volumes
The LVM snapshot feature provides the ability to create virtual images of a device at a particular
instant without causing a service interruption. When a change is made to the original device (the
origin) after a snapshot is taken, the snapshot feature makes a copy of the changed data area
Chapter 2. LVM Components
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