AdvancedCopy Manager can back up or replicate volumes under the control of LVM (referred to as LVM volumes in this document) in the following units:
Volume group
Physical disk that constitutes a volume group
For information on the backup and replication of LVM volumes, refer to the "LVM Volume Operation" sections in the chapters on "3.8 LVM Volume Operation" and "6.8 LVM Volume Operation".
LVM volumes are volumes which are managed in units of volume groups containing logical volumes.
AdvancedCopy Manager copies each physical disk that constitutes a volume group.
An LVM volume that can be operated in units of logical volumes must satisfy the following conditions:
One volume group contains only one physical disk, and logical volumes are configured so that one physical disk includes <n> logical volumes.
Figure 1.5 Support configuration
LVM allows multiple logical volumes to be defined on a single physical disk (a logical volume is referred to as LU: Logical Unit). The boundaries of logical volumes can be defined independently of the boundaries of the host physical disk.
A configuration in which one volume group contains multiple logical volumes is also supported.
For operation, please note the following:
A logical volume for which a file system was constructed must be unmounted before backup or replication can be performed and remounted after the backup or replication has completed.
In this case, the individual physical disks that constitute a volume group in which a logical volume exists are used as management units.
Use this type of operation when a volume group has a configuration that is not supported for operations in units of volume groups.
Note
For operations in a cluster configuration, the device name of the physical disks that comprise a volume group must be the same at all servers comprising the cluster, and all the ETERNUS disks indicated by the device name must be the same.
Figure 1.6 Configuration that is not supported for operation in units of volume groups
Copying during backup or replication must be performed while maintaining the integrity of an entire volume group.
