The Solaris boot process in a nutshell is the process of boot loading RC scripts to reach single or multiuser level
Understanding the booting process is important in the sense that you can get a clear idea when a system faces a booting problem and steps involved.
The /etc/inittab file plays a crucial role in the boot sequence. For versions of Solaris prior to version 10, the /etc/inittab was edited manually.
A system's run level (also known as an init state) defines what services and resources are available to users.