Creating a Metro Mirror relationship

Complete this task to create a Metro Mirror relationship between a source volume and target volume.

Before you begin, ensure that you have met the following conditions:

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 Metro Mirror relationships.
Identify the source volumes and the target volumes for the Metro Mirror relationships.
Identify the LSSs that contains the desired source volumes and target volumes.

Metro Mirror is a function of a storage server that constantly updates a target copy of a volume to match changes made to a source volume. The source and target volumes can be on the same storage unit or on separate storage units. Metro Mirror creates the remote mirror and copy relationship in a synchronous manner.

Metro Mirror functions run on the DS6000™ storage units and are supported on many operating systems. For example, if you set up and configure your DS6000 to use i5/OS^®, you can use Metro Mirror to create a copy of a System i™ disk pool on a separate DS6000, typically in a remote location.

Perform the following steps to create a Metro Mirror relationship between a source volume and target volume:

In the navigation, select Real-time Manager > Copy Services > Metro Mirror.
Select a storage complex from the 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 the resource Specify (LSS, Host attachment, Volume Group, Show all volumes) from which to access volumes.
Select Create from the Select Action drop-down box. Then click Go. The Create Metro Mirror page displays.
In the Volume pairing method page, you must specify one of the following methods by which to select volume pairs and then click Next .
1. If you click the Automated volume pair assignment, the first selected source volume is paired with the first selected target volume automatically.
2. If you click Manual volume pair assignment, you must select each specific target volume for each selected source volume.
In the 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 where you can create a new path.
In the Select target volumes page, select target volumes. Click the storage complex drop down box to change where target volumes are selected and then click Next. Consider the following guidelines:
1. If you selected the automated pairing method, each source volume that you selected is paired with a target volume.
2. If you selected the manual pairing method, you can select target volumes from different LSSs on the target storage unit. This page repeats for each of the source volumes that you selected.
In the Select copy options page, select the options you want to apply to the volume pairs and click Next. Consider the following options:
1. Select the Perform initial copy option the first time a relationship is created as it is needed to ensure that the entire source volume is copied to the target volume to guarantee that the source and target volumes contain the same data.
2. 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 count-key-data volumes only.
3. The Suspend Metro Mirror relationship after initial copy option applies only to Metro Mirror relationships. This means that after data is completely copied to the target volume of that volume pair, the target volume goes into a suspended state.
In the Verification page, 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.