IBM V7000 Introduction And Implementation Manual page 453

Switching the direction of a stand-alone Remote Copy relationship
The copy direction of the Remote Copy relationship could be switched by selecting the
relationship and clicking Switch from the Actions drop-down menu (Figure 9-96).
Figure 9-96 Switch Remote Copy relationship
A warning message opens and shows you the consequences of this action (Figure 9-97). If
you switch the Remote Copy relationship, the copy direction of the relationship becomes the
opposite, that is, the current primary volume becomes the secondary, while the current
secondary volume becomes the primary. Write access to the current primary volume is lost
and write access to the current secondary volume is enabled. If it is not a disaster recovery
situation, you need to stop your host I/O to the current primary volume in advance. Make sure
that you are prepared for the consequences, and if so, click OK to continue.
Figure 9-97 Warning message for switching direction of a Remote Copy relationship
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Chapter 9. IBM Flex System V7000 Storage Node Copy Services