The SunOS release 5.7 software has these additional options for the boot command:
Type boot -r when you add new hardware or alter its location. This option creates the physical and logical device names, with the logical device name linked to the physical device name.
Type boot -v when you want to see all the system bootup messages; the default is to boot silently. The messages are always stored in the /var/adm/messages file.
Type boot -a when you want to be prompted for the name of an alternate kernel, /etc/system file, or path name for kernel module directories.