1 migratedata  -log filename
2?  -f
3+ 
3?  -phase
3.1!migrate
3.1.1?  -checkpoint blocks 
3.1.2?  -resume
3.1 3.1!plan
3.1 verify
3.1.1?  -data
4  -destdir dest_directory_name 
5+ 
5 source_path