Create Pair

This help page provides information to guide you through the procedure to create a Pair. It contains the following topics:

Overview

A pair of volumes is two volumes on an array that have a specific relationship between them. They are named primary volume (PVOL) and secondary volume (SVOL). The primary volume contains the original data and the secondary volume contains an exact copy of the data on the primary volume and is synchronized with the primary volume. When the volumes are synchronized, any changes made to the primary volume are automatically made to the secondary volume as well.

ShadowImage takes time to initial copy when you create pair, depending on the size of the primary volume.

Creating a Pair (back to top)

This section provides the details required to create a pair.

Prerequisites

Before you attempt to create a pair, ensure that at least two logical units (volumes) have already been created.

To create a pair in the selected arrays:

In the Arrays window, select the array on which to create a pair and then click Show and Configure. The Array window and Explorer tree are displayed.
In the Explorer tree, expand the Replication menu and select Local Replication.
In the Local Replication window, ensure that the Basic tab is displaced.
In the Basic tab, click Create Pair.
In the Copy Type field select either ShadowImage or SnapShot. The volumes listed in the Primary volume and Secondary volume list boxes change according to the selected function.
In the Pair Name field, enter a name.
Select Remote Array.
Select a primary volume and a secondary volume. Both the primary and secondary volumes must be the same size.
If you selected SnapShot as the Copy Type, select Data Pool in the Data Pool number drop-down list.
If you do not need to change anything in the Advanced Settings tab, skip steps 11 - 13. Otherwise, click the Advanced tab.
In the Advanced tab, select Group Number or Group Name, depending on what you need to modify.
Select a Copy Pace from the drop-down list.
To change the default settings, click the check box below the list.
Click OK to save the setting and continue, or Cancel to exit without creating a pair.
In the displayed message box, read the confirmation and warnings, then click the to the left of the text to agree.
Click Confirm to continue or Cancel to close the window and exit without creating a pair.
When the pair has been created, a message box is displayed. Click Close to exit the window and go back to the Local Replication window. You should now see the new pair listed in this window.