Then the creation wizard displays the Volume Pairing Method panel; see Figure 26-16. Here
you select Manual volume pair assignment .
Figure 26-16 Global Copy creation step 1 - choose volume pairing method
Click Next to proceed with the second step of this wizard.
Then the creation wizard displays the "Select source volumes" panel; see Figure 26-17.
Figure 26-17 Global Copy creation step 2 - select the source volumes
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IBM System Storage DS6000 Series: Copy Services with IBM System z