b300e743_g_the_Solaris_Operating_System__For_Instructions
[Task] Boot a zone in single-user mode. [Description] Boots only to milestone svc:/milestone/single-user:default. This milestone is equivalent to init level s. See the init(1M) and svc.startd(1M) man pages. [For Instructions] 
How to Boot a Zone in Single-User Mode
openSolaris 2008 - <tt>lx</tt> Branded Zone Installation (Task Map) - System Administration Guide: Virtualization Using the Solaris Operating System