Hitachi NVM Navigator v03-07 User Manual page 108

When you want the destination LPAR to be selected automatically:
Check Auto check box in Target Selection group box in Migration [Shutdown]
window. Then the function which selects the destination LPAR automatically is
enabled. When you check Auto check box and then select an HVM in
Destination group box, the LPAR with the youngest LPAR number is selected as
the destination LPAR automatically. However, when you change the
destination LPAR to another LPAR, select the destination LPAR manually.
3-8 Migration procedures
HVM Navigator User's Guide - Migration