HP StorageWorks XP Business Copy User Guide: HP XP12000 Disk Array HP XP10000 Disk Array HP 200 Storage Virtualization System (T1713-96028, June 2010)

When the At-Time Split function is enabled, data in all P-VOLs in the same consistency group is copied
to the corresponding S-VOLs when the disk array receives the pairsplit request from the host server.
The following figure shows an overview of the At-Time Split function.
Figure 13 Overview of At-Time Split function
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Enabling the At-Time Split function using RAID Manager
1. Create BC At-Time Split pairs as follows:
a. Define a consistency group for BC pairs. You cannot define L1 and L2 cascade pairs (see
Cascade function) sharing the same node volume in a consistency group. If you specify such
pairs in the same consistency group, the paircreate command will be rejected.
b. Specify the At-Time Split option.
c. Execute the paircreate command.
2. Execute the pairsplit command on the new BC At-Time Split pairs.
The At-Time Split option is enabled, and data in all P-VOLs in the same consistency group is
copied to the corresponding S-VOLs when the disk array receives the pairsplit request.
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