Creating a Global Copy volume pair

Use this process to create a Global Copy volume pair.

Before you begin with this task, follow these guidelines:

Ensure that the Remote Mirror and Copy license key is installed and enabled to allow operations to be performed.
Set up the paths between the source and the target LSSs for the Global Copy relationships.
Identify the source volumes and the target volumes for the Global Copy relationships.
Identify the LSSs that contains the desired source volumes and target volumes.

If your environment has bandwidth restrictions or has extended distance requirements, Global Copy is an excellent solution for your disaster recovery solutions and data copying requirements. The source volume sends a periodic, incremental copy of updated tracks to the target volume instead of a constant stream of updates. This causes less impact to application writes for source volumes and less demand for bandwidth resources, while allowing a more flexible use of the available bandwidth.

Global Copy can operate at very long distances (continental), well beyond the distance supported for Metro Mirror transmissions. The distance is limited only by the network and channel extender technology.

In the navigation, under Manage Copy Services, select Metro Mirror. A page containing a list of Metro Mirror volumes displays. Select one or more volumes on which to perform an action.
In Metro Mirror — Main Page, select Create from the Select Action drop-down box. Then click Go. The Create Metro Mirror page displays.
Select a storage complex from the Select storage complex drop-down box.
Select a storage unit from the Storage unit drop-down box. continue to the next step.
Select a resource type from the Resource type drop-down box.
Select which resource to view from the Specify (LSS, volume group, storage type) drop-down box.
In Create — Volume pairing method page, you must specify one of the following methods by which to select volume pairs.
1. If you click Automated volume pair assignment method, source volumes are paired with target volumes automatically. If you select this method, target volumes are selected automatically.
2. If you click Manual volume pair assignment , you must select each specific target volume for each selected source volume.
Click Next.
In the Create Metro Mirror — Select source volumes page, select the volumes that you want to include for the Metro Mirror relationships.
1. Optionally, you can click the Create paths button to create a new paths. If you select this button, the Create paths page displays to allow you select the new paths.
Click Next.
In Select target volumes (auto pairing) page, select the target volumes. This page displays if you selected the auto pairing method; only valid, eligible target volumes are displayed.
In Select target volumes (manual pairing) page, select the target volumes. This page displays if you selected the manual pairing method. Select the same number of target volumes as you selected for source volumes. This page repeats for each of the source volumes that you selected.
Click Next.
In Create Metro Mirror — Select copy options page, select the options you want to apply to the volume pairs. The Enable critical volume mode option is supported for count-key-data volumes only. The Create relationship even if target is online to host option is available for zSeries volumes only.
Click Next.
In Create Metro Mirror — Verification, review the attributes and values to verify that they are correct.
If the attributes and values are not correct, click Back as appropriate to return and then specify the correct values. Otherwise, click Finish to complete the Metro Mirror creation process.