Setting up global-active device

Setting up global-active device (GAD) consists of several steps. However, many of the steps are now automated when you use the Ops Center Automator Global-Active Device Setup service.

For online migration, you need GAD to:

Create a virtual storage machine (VSM)
Create a VSM on the secondary storage system.
Create remote paths
Create a remote path group between the primary and secondary storage systems.
Allocate command devices (optional)
Allocate command devices from the primary and secondary storage systems to user-specified pair management servers.

The following procedure provides the steps required to set up GAD when using the service.

Review the required software and setup prerequisites listed in Global-Active Device Setup: Service details.

Note: All setup prerequisites are included in this procedure, but you can find specifics based on storage system model in the service details topic.
Connect the storage system ports.
1. Physically connect the ports between the primary (source) storage system and the secondary (target) storage system.
2. If you are using Fibre Channel (FC) for the remote connection between the source and target storage systems, set the zone information.
  - If you are using a Brocade FC switch, see the Brocade Network Advisor (BNA) documentation for more information.
  - If you are using a Cisco FC switch, see the Data Center Network Manager (DCNM) documentation for more information.
3. Physically connect the ports between the source and target storage system and the storage system on which you plan to create the Quorum disk.
4. If you are using Fibre Channel (FC) for the remote connection between the source and target storage systems, and the storage system with the Quorum disk, set the zone information using BNA or DCNM.
Complete the following Quorum Disk setup steps using either Command Control Interface (CCI) or Storage Navigator. (Not required if using diskless Quorum)
For more information, see the Command Control Interface Command Reference.
1. Set the attributes of the remote connection port and the port connected to the Quorum Disk.
2. Create the volume for the Quorum disk.
3. Register the Quorum disk as an external volume on both the source and target storage systems.
Complete the following Ops Center API Configuration Manager setup steps. You complete these steps one time and do not need to repeat them.
1. In Ops Center Automator, set up a web service connection to both Ops Center API Configuration Manager servers managing the storage systems.
  
  See Configuring Configuration Manager REST API connections for more information.
2. Register the source storage system and the target storage system into Ops Center API Configuration Manager.
  See Registering storage systems to an Ops Center API Configuration Manager REST API connection for more information.
In Ops Center Automator, complete the following steps:
1. On the Services tab, select the GAD Setup service, and in the service preview pane, click Create Request.
2. Configure the GAD Setup service by entering the required information. For more information on the required parameter settings, see Global-Active Device Setup: Service details.
  The configuration information you enter enables the service to complete the following actions when you run the GAD Setup service:
  - Register the specified volume as a Quorum Disk.
  - Create a remote path group using the combination of the selected ports.
  - (Optionally) Allocate the command device for the source and target storage system to the pair management server. You can select whether to create the command device when you submit the service.
  - Create a Virtual Storage Machine (VSM) with the serial number of the source storage system on the target storage system.
3. Submit the service and verify that the task completed successfully.
Install CCI on the pair management server.
See the Global-Active Device User Guide for more information.

If you set up GAD for use with the Ops Center Automator Online Migration service templates, continue with Migrating online data with Configuration Manager.