Boot PROM

1. The PROM displays system identification information and then runs self-test diagnostics to verify the system's hardware and memory.

2. The PROM loads the primary boot program, bootblk. This program's purpose is to load the secondary boot program (that is located in the UFS file system) from the default boot device.

Boot programs

3. The bootblk program finds and executes the secondary boot program, ufsboot, and loads it into memory.

4. After the ufsboot program is loaded, the ufsboot program loads the kernel.

Kernel initialization

5. The kernel initializes itself and begins loading modules by using ufsboot to read the files. When the kernel has loaded enough modules to mount the root (/) file system, the kernel unmaps the ufsboot program and continues, using its own resources.

6. The kernel creates a user process and starts the /sbin/init process. This process starts other processes by reading the /etc/inittab file.

init

7. In this Solaris release, the /sbin/init process starts /lib/svc/bin/svc.startd, which starts system services that do the following:

In addition, svc.startd executes the run control (rc) scripts for compatibility.