Mapping remote command devices

For information about command device and remote command device configurations, see Setting up remote command devices for use with CCI.

Procedure

1. Set a path for the external port and target port of each site.

For details about the external port, see the Universal Volume Manager User Guide. For details about port and LU path settings, see the Provisioning Guide for your storage system.

2. Set command devices for all sites.

For details about setting command devices, see the Provisioning Guide for your storage system.

3. In the site in which you are creating a pair, map command devices in all sites as remote command devices.

For details about mapping remote command devices, see the Universal Volume Manager User Guide.

Result

When the above procedure is performed, the status of each site changes as follows:

• Each site has two command devices mapped to the other two sites through two target ports.

• Each site has two remote command devices mapped from the other two sites through an external port.

In the Logical Devices window, logical devices that are command devices or remote command devices are displayed as Command Device or Remote Command Device (in the Attribute column). For details about the Logical Devices window, see the Provisioning Guide for your storage system.

The following figure shows a configuration of command devices and remote command devices.

When mapping of remote command devices to each site is complete, you must assign mirror IDs to the remote command devices. This operation is required for delta resync operations.