Chapter 1
Configuring the System Console
21
Reaching the
sc>
Prompt
There are several ways to get to the
sc>
prompt:
■
If the system console is directed to the serial management and network
management ports, you can type the ALOM CMT escape sequence (
#.
).
■
You can log in directly to the system controller from a device connected to the
serial management port. See
“Accessing the System Controller” on page 7
.
■
You can log in directly to the system controller using a connection through the
network management port. See
“Activating the Network Management Port” on
OpenBoot
ok
Prompt
A SPARC Enterprise T2000 server with the Solaris OS installed operates at different
run levels
. For a full description of run levels, refer to the Solaris system
administration documentation.
Most of the time, you operate a SPARC Enterprise T2000 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 a SPARC Enterprise T2000 server is at run level 0, the
ok
prompt appears.
This prompt indicates that the OpenBoot 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.
■
When a serious hardware problem develops while the system is running, the
operating system transitions smoothly to run level 0.
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