For a Remote Mirror configuration, each disk or enclosure in the disk group is assigned to one of the sites in the configuration. Use site tags to specify to which site each storage device in the disk group belongs.
Assign a site tag in one of the following ways:
Using automatic site tagging on a disk group.
See Configuring automatic site tagging for a disk group.
Manually tagging one or more disks or enclosures.
The disks or enclosures need not be included in a disk group.
See Configuring site tagging for disks or enclosures.