Software Manual

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For instructions on using Business Continuity Manager, please refer to the Business Continuity Manager™
User and Reference Guide.
An SI390 consistency group is a user-defined set of SI390 volume pairs used for the At-Time Split function
and have the following restrictions:
• You can configure up to 128 consistency groups in a disk array, including the BC consistency groups.
• A number (0-127) is assigned to each consistency group. You can specify a consistency group number
when you create SI390 pairs.
• You can view the ID of the consistency groups used as the pair unit using Command View XP or XP
Remote Web Console or by executing the ATQUERY command.
• You can define up to 1,024 SI390 pairs in a consistency group.
• SI390 pairs and BC pairs cannot co-exist in the same consistency group.
Figure 7 and Figure 8 show the outline of the At-Time Split function.
Figure 7 At-Time Split function (specifying copy group)
Figure 8 At-Time Split function (specifying the split time)
The SI390 At-Time Split function can be used only by executing the PPRC TSO commands.