Creating a FlashCopy target volume on an existing Metro Mirror source volume

Complete this task to create a FlashCopy^® target volume on an existing Metro Mirror source volume.

The Establish target on existing Metro Mirror source option takes a point-in-time copy of a volume and makes a copy at a remote site. This option is available as a check box both on the Create FlashCopy relationship — Select common options wizard page and on the Resync FlashCopy page.

Perform these steps during FlashCopy creation:
1. In the navigation, select Real-time Manager Copy Services FlashCopy. A list of FlashCopy volumes is displayed.
2. Select Create... from the Select Action drop-down menu and click Go.
3. Select the type of relationship to create (single source volume with a single target or single source volume with multiple targets), and click Next.
4. On the Select source volumes page, select the source volumes for the FlashCopy relationships, and click Next.
5. On the Select target volumes page, select your target volumes.
6. When you have finished selecting your target volumes, click Next.
7. On the Select common options page, select the Establish target on existing Metro Mirror source option.
8. Review the options, and click OK to proceed.
Perform these steps during Resynch FlashCopy processing:
1. In the navigation, select Real-time Manager > Copy Services > FlashCopy. A list of FlashCopy volumes is displayed.
2. Click on one or more FlashCopy volume pairs on which to establish FlashCopy targets on a Metro Mirror source volume.
3. On the FlashCopy main page, click on the Resync FlashCopy action from the Select Action drop-down menu. Click Go. The Resync FlashCopy page is displayed.
4. Select the Establish target on existing Metro Mirror source option.
5. Review the options and click OK to continue.
  Note: By default, when you issue a Resync FlashCopy action to a FlashCopy relationship, this action acts as an incremental FlashCopy relationship. This means that if you created the FlashCopy relationship with the Change Recording and Persistent options, the volume pair is synchronized and a record of all host write operations to the source is maintained in the source volumes. Afterwards, you when issue the Resync FlashCopy action to the same FlashCopy relationship, only the new write operations to the source are copied to the target. This minimizes the data that is copied to the remote site when you use the Establish target on existing Metro Mirror source option.