124 Implementing the IBM Storwize V5000 Gen2 with IBM Spectrum Virtualize V8.1
3.7.3 FlashCopy mappings
To create a new FlashCopy mapping, click Create FlashCopy Mapping (shown in
Figure 3-74) to start a wizard. This wizard maps a source volume to a target volume to
prepare for a subsequent copy. This mapping persists until it is deleted. The mapping
specifies the source and destination volumes. The destination must be identical in size to the
source or the mapping fails.
Figure 3-74 FlashCopy mappings
In a single mapping, the source and destination cannot be on the same volume. A mapping is
triggered at the point in time when the copy is required. The mapping can optionally be given
a name and assigned to a consistency group. These groups of mappings can be triggered at
the same time, enabling multiple volumes to be copied at the same time, which creates a
consistent copy of multiple disks. A consistent copy of multiple disks is required for database
products in which the database and log files are on separate disks.
If a consistency group (ID or Name) is not specified, the mapping is assigned to the default
group 0, which is a special group that cannot be started as a whole. Mappings in this group
can be started only on an individual basis.
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