HP XP7 Storage - Manual (Page 87)

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Use cases
As an example of pair operation, the following shows use cases that can be created a pair
by specifying a copy group.
◦ Creating a pair in cases where the device names and the numbers of LDEVs in two device
groups in a copy group configured of simplex volumes are the same.
In the following example, pairs are created with LDEVs that have the same device name,
A to A and B to B.
◦ Creating a pair in cases where the device names and the numbers of LDEVs in two device
groups in a copy group configured of simplex volumes and paired volumes are the same.
In the following example, a pair is created with LDEVs for the device name A. And no
operation is performed for the volumes of device name B that are already formed into
copy pairs.
◦ Creating a pair in cases where different device names exist in two device groups in a
copy group configured of simplex volumes.
In the following example, a pair for device name A can be created, but not for device
name B and C because they have different names.
◦ Creating a pair in cases where the device names in two device groups in a copy group
configured of simplex volumes and paired volumes are different.
In the following example, a pair for device name A to A can be created. For the device
name B and C, although it does not change the paired status, but an error occurs because
they have different device names.
LDEV grouping function 87