The Live Partition Mobility (LPM) helps on environment management. BUT, when it doesn't works is a problem.
Recently I received the error HSCLA27C on validate and to fix it I recommend check out your Storage Area Network (SAN) zoning and disk allocation/mask. It is the most common problem IMHO.
About the requirements about zoning and mask:
When you create a LPAR it has two WWNs for virtual fiber channel ...