When you select a Volume, Permission Group, Object Type, or Properties filter from which to select data to copy, the software searches upward in the hierarchy until it locates the lowest common parent. This search is conducted at processing time or when the MDR Wizard is "preparing to copy."
The following illustration shows a simple system hierarchy and the lowest common parent. The software considers the data selected by filter, and locates the first parent that all have in common.
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The Lowest Common Parent, in this example Building 1, is not copied as part of the MDR process.
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In MDR, if a filter that is defined only on the System tab is used, then MDR behaves in the same way it does when you choose the Source system selection method; that is, the parts of all source systems selected are mapped to a destination or target system.