System Administration Guide: Virtualization Using the Solaris Operating System

Failsafe Mode

If a login problem occurs and you cannot use the zlogin command or the zlogin command with the -C option to access the zone, an alternative is provided. You can enter the zone by using the zlogin command with the -S (safe) option. Only use this mode to recover a damaged zone when other forms of login are not succeeding. In this minimal environment, it might be possible to diagnose why the zone login is failing.