When the system boots it stops and displays reference code 551. This reference code means the rootvg will not varyon. What is the best way for the administrator to proceed?
This code indicates that the rootvg will not varyon, and performing a maintenance boot allows the administrator to diagnose the issue and fix it. From the IBM AIX v7 Administrator Specialty Study Guide: 'When the system is halted with a reference code 551, the rootvg will not varyon and the system will not boot. The administrator must perform a maintenance mode boot to diagnose the problem.'