Global Mirror — Main page

Use this page to create and manage Global Mirror sessions for one or several sets of volumes.

Introduction

The Global Mirror function provides a two-site extended distance remote copy option for disaster recovery. With Global Mirror, the data that the host writes to the storage unit at the local site is asynchronously copied to the storage unit at the remote site. A consistent copy of the data is then automatically maintained on the storage unit at the remote site.

If you select a storage unit that is not a master storage unit, a message displays informing you that the storage unit is not a master (or primary) for Global Mirror. If the storage unit is a master, then the table displays data about existing Global Mirror sessions.

This page is the starting point for creating Global Mirror sessions for one or more volumes. You can select the storage complex (and storage unit) from which to select volumes to include in a Global Mirror session.

This page also displays existing established Global Mirror sessions and associated session number and consistency group information for example. If the table is empty, no sessions have been defined for the selected storage complex.

You can select the volume pair that you want to manage by selecting the check box that is associated with the volume pair. The Select Actions options are changed based on the attributes of the selected volume pair, which determine the possible actions that can be performed on the volume pair. The following are actions that can be display for the selected volume pair.

Create: A Global Mirror session is created for one or more volumes.
Delete: The Global Mirror session is deleted.
Modify: The selected Global Mirror session that allows you add or remove volumes from the session.
Pause: The Global Mirror session for a set of volumes between the master storage image and all its Subordinates LSSs is paused.
View session volumes: The selected volumes of the Global Mirror session are displayed.
Properties: The properties of the Global Mirror session and its associated volumes are displayed.

The Global Mirror feature is accessible only from the Real-time Manager; the Global Mirror feature is not accessible from the Simulated Manager.

Menu path

Real-time manager > Copy services > Global Mirror > Go

Fields

Storage complex: The nicknames of storage complexes that are available for selection. When you create new Global Mirror sessions for volumes, the storage complex (and storage unit and LSS, for example) that you select through filtering determines where the selection of volumes are accessed. Nicknames are created by the user when resources are created and can be used as part of an overall scheme or naming convention for making resources easier to identify and manage.
A storage complex describes a group of storage units such as the DS6000™s that is managed by a single management console. If you have only one DS6000 storage unit, then your storage complex consist of one storage unit.
Storage unit: The nickname of storage units that are available for selection. This list can include any nickname that is associated with any 2107, 1750, and 2105 Model 800 that is currently displayed in the Storage units main page. A storage unit consists of a single DS6000.
Select: Check the select box to perform actions on specific table rows

Session number

The user-assigned session number, which consists of two hexadecimal characters ranging from 01 - FF (1-255 in decimal). This number is unique across the enterprise and uniquely identifies the session. It identifies volumes that will be included in the Global Mirror session.

If you click on the link for a particular session number in the table, the Global Mirror properties — General page is displayed. If no Global Mirror sessions exist, the table is empty.

Storage units

The quantity of storage units on which this session has volumes.

State

The copy state of the session (Running, Paused, Fatal)

Running: When a Global Mirror session is resumed, the state is Running.
Paused: The Global Mirror session is paused. You can pause a session and later resume the session.
Failed: The Global Mirror session has failed.

Consistency group time

The time recorded when the last successful consistency group was formed.