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Chapter 3 Storage Arrays 3-79
Dynamic Volume Expansion (DVE) is a modification operation used to increase the
capacity of standard or snapshot repository volumes. The increase in capacity can be
achieved by using any free capacity available on the volume group of the standard
or snapshot repository volume.
Data will be accessible on volume groups, volumes, and disk drives throughout the
entire modification operation.
During the modification operation, the volume having its capacity increased shows a
status of Operation in Progress, together with its original capacity and the total
capacity being added (Figure 3-33). After the increase in capacity is completed, the
volumes expanded capacity is displayed, and the final capacity for the Free Capacity
node involved will show a reduction in capacity. If all of the free capacity is used to
increase the volumes size, then the Free Capacity node involved will be removed
from the Logical View.
FIGURE 3-33 DVE Modification Operation in Progress
An increase in storage capacity for snapshot repository volumes would be
completed if a warning is received that the snapshot repository volume is in danger
of becoming full. Increasing the capacity of a snapshot repository volume does not
increase the capacity of the associated snapshot volume. The snapshot volume's
capacity is always based on the capacity of the base volume at the time the snapshot
volume is created.
Remote Volume Mirroring
This is a premium feature of the storage management software and must be enabled
either by you or your storage vendor. The Remote Volume Mirroring feature is used
for online, real-time replication of data between storage arrays over a remote
distance.