1 addiscsistorageport 
1 
2?  -iogrp
2.1 iogrp_id
2.1 iogrp_name
3?  -username target_user_name
4?  -chapsecret target_chap
5 
6?  -site
6.1 site_id
6.1 site_name
7  candidate_id