12 Sun Blade T6300 Server Module Administration Guide • April 2007
Reaching the sc> Prompt
There are several ways to obtain the sc> prompt:
■ You can log in directly to the ALOM system controller from a device connected to
the serial port. See “Accessing the System Controller” on page 3.
■ You can log in directly to the ALOM system controller using a connection through
the network management port. See “Activating the Network Management Port”
on page 4.
■ If you have logged in to the ALOM system controller and then directed the
system console to the serial port and network management ports, you can return
to the prior ALOM session by typing the ALOM system controller escape
sequence (#.).
OpenBoot ok Prompt
The server with the Solaris OS installed is capable of operating at different run levels.
A synopsis of run levels follows. For a full description of run levels, refer to the
Solaris system administration documentation.
Most of the time, you operate the server at run level 2 or run level 3, which are
multiuser states with access to full system and network resources. Occasionally, you
might operate the system at run level 1, which is a single-user administrative state.
However, the lowest operational state is run level 0. At this state, it is safe to turn off
power to the system.
When your server is at run level 0, the ok prompt appears. This prompt indicates
that the OpenBoot PROM firmware is in control of the system.
There are a number of scenarios under which OpenBoot firmware control can occur.
■ By default, before the operating system is installed the system comes up under
OpenBoot firmware control.
■ When the auto-boot? OpenBoot configuration variable is set to false the
system boots to the ok prompt.
■ When the operating system is halted the system transitions to run level 0 in an
orderly way.
■ When the operating system crashes the system reverts to OpenBoot firmware
control.
■ During the boot process, when there is a serious hardware problem that prevents
the operating system from running, the system reverts to OpenBoot firmware
control.
