# Creating a Replication Pair

#### Scenarios

You can create replication pairs for desired disks and add the replication pairs to a specified protection group. When you create a replication pair:

- If the protection group is in the Available state, protection is disabled. The production site disk and DR site disk have formed a replication pair, but data synchronization is not started. To start data synchronization, enable protection.
- If the protection group is in the Protecting state, protection is enabled. After you create a replication pair, data synchronization is automatically started.

After a replication pair is created, the default name of the DR site disk is the same as the name of the production site disk, but their IDs are different.

To modify a disk name, click the disk name on the replication pair details page to switch to the disk details page and modify it.

#### Prerequisites

- The protection group is in the Available or Protecting state.
- If Server Type of the protection group is ECS, the disks used to create the replication pair are in the Available state.

#### Procedure

1. Log in to the management console.
2. Click Service List and choose Storage > Storage Disaster Recovery Service.

   The Storage Disaster Recovery Service page is displayed.

3. In the pane of the protection group for which replication pairs are to be added, click Replication Pairs.

   The operation page for the protection group is displayed.

4. On the Replication Pairs tab, click Create Replication Pair.

   The Create Replication Pair page is displayed.

   Figure 1 Creating a replication pair
5. Configure the basic information about the replication pair listed in Table 1.

   Table 1 Parameter description
   Parameter | Description | Example Value
   --- | --- | ---
   Protection Group Name | Indicates the name of the protection group to which the replication pair to be created belongs. You do not need to configure it. | Protection-Group-test
   Protection Group ID | Specifies the ID of a protection group. | 619c57e9-3927-48f8-ad14-3e293260b8a0
   DR Direction | Indicates the replication direction of the protection group to which the replication pair to be created belongs. You do not need to configure it. | eu-de-01 -> eu-de-02
   Production Site | Specifies the AZ of the production site. | eu-de-01
   Production Site Disk | This parameter is mandatory. Select a disk. | volume-01
   Replication Pair Name | Indicates the replication pair name. This parameter is mandatory. Configure this parameter when you create a replication pair. Then, you can use this name to classify and search this replication pair. | replication_001

6. Click Create Now.
7. On the Confirm page, you can confirm the replication pair information.

   - If you do not need to modify the information, click Submit.
   - If you need to modify the information, click Previous.
8. Click Back to Protection Group Details Page and query the replication pairs of the protection group.

   If the replication pair status changes to Available or Protecting, the replication pair has been created successfully.

Parent topic: Managing Replication Pairs