Figure 56 Copy Group Operational Image for Non Gen'ed Volumes Using a Command Device
For Business Copy for Mainframe, you do not need a command device to perform operations on
Non Gen'ed volumes because of using the Gen'ed volumes that are Business Copy for Mainframe
pairs.
Figure 57 (page 95) presents an operational image of a copy group including Non Gen'ed volumes
using a Gen'ed volume that is a Business Copy for Mainframe pair.
Figure 57 Copy Group Operation for Non Gen'ed Volumes Using a Gen'ed Volume that is a BC Z
Pair
Notes on Executing an NG Scan
• Do not execute both a local scan and an NG scan on the same volume. Doing so enables
the disk configuration definition files for both the local scan and NG scan. Therefore, carefully
consider that the same volume is defined as the P-VOL and S-VOL of the Business Copy.
• If a Gen'ed volume is changed to a Non Gen'ed volume, or if a Non Gen'ed volume is
changed to a Gen'ed volume, you need to rescan and then redefine the copy groups. Before
re-scanning, delete unnecessary disk configuration definition files.
• You cannot check if the capacities of P-VOLs and S-VOLs are the same when defining copy
groups because volume capacity is not acquired by an NG Scan. Therefore, define copy
pairs so that the capacities of the P-VOLs and S-VOLs are the same.
The Logical Path Control Function
Use one of the types of Logical Control Path functions to establish and delete remote inter-disk
controller paths, and create an environment for logical paths required for operations from the
primary site to Business Continuity Manager.
There are two types of logical paths:
• Inter-control unit logical paths
• Inter-disk controller logical paths
The Logical Path Control Function 95
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