HP XP Racks - Manual (Page 112)

For Business Copy Z
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 Z pairs.
NOTE: You need a command device to use the YKQRYDEV command to acquire Non Gen'ed
volume information.
Figure 64 (page 112) presents an operational image of a copy group including Non Gen'ed volumes
using a Gen'ed volume that is a Business Copy Z pair.
Figure 64 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.
•
When disk configuration is acquired using an NG scan on any of the storage systems below,
the capacities of the discovered volumes are not acquired. Therefore, the P-VOLs' and S-VOLs'
capacities for pairs cannot be checked by BCM. Make sure that you define pairs so that the
capacities of the P-VOLs and S-VOLs are equal when using disk configuration information
acquired using an NG scan of any of the following storage systems.
◦ XP12000 Disk Array
◦ XP24000 Disk Array
The Logical Path Control function
Use one of the types of Logical Path Control 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
112 Understanding Business Continuity Manager functions