HP StorageWorks XP Remote Web Console Software - Manual (Page 41)

Figure 21 Total Capacity of XP Business Copy Volumes (Example 1)
Figure 22 (page 41) illustrates one XP Business Copy pair. In this case, the total capacity of XP
Business Copy volumes in use will be 2.
Figure 22 Total Capacity of XP Business Copy Volumes (Example 2)
Figure 23 (page 41) illustrates XP Business Copy pairs (L1 pairs and L2 pairs). In this case, the
total capacity of XP Business Copy volumes in use will be 5.
Figure 23 Total Capacity of XP Business Copy Volumes (Example 3)
Requirements for RAID Manager
To use RAID Manager for XP Business Copy operations, you need to have one volume for RAID
Manager’s command device. For details about how to set the command device, see the HP XP
RAID Manager User Guide.
Assessing Requirements
This section describes the assessments about XP Business Copy operations, such as how many
pairs you are going to create or how to decide the settings like copy pace and paths.
Calculating Maximum Number of Pairs
When you create XP Business Copy pairs, resources called differential tables and pair tables will
be required. The number of available differential tables and pair tables in one storage system
depends on whether additional shared memory is installed or not.
Table 15 (page 42) describes
the differential and pair tables that are supported by the options for adding shared memory.
Assessing Requirements 41