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Physical Aspects of Integrity Consoles
On the back panel of Integrity servers, there are both network and serial connections to the
service processor. The network port is identified as “Management LAN” and the serial port
is identified as “Console”. On Superdome and the rx4640, this port is on the back panel.
On all other Integrity servers, this “Console” serial port is on a breakout cable along with the
“Remote” and “UPS” serial ports.
Management Processor
The management processor of a system is the place to go for all of your headless console
needs. Integrity systems have used different names for this function, such as GSP, MP, and
iLO. Microsoft refers to this hardware as a Service Processor. Regardless of the name, this
management processor has the same role; it provides the virtualization of the serial port
that is used for the EMS. This processor is powered by a stand-by voltage and is running as
long as there is AC power applied, even if the rest of the system is not powered on.
Emergency Management Services
EMS is the out-of-band communication path that used for all headless interaction. If a
system has a serial port that is assigned to be the EMS port, it is no longer available to the
OS for any other use, such as the interface to a UPS. This path can host multiple channels of
communication, from firmware messages at power-on all the way to a command line
interface once the OS has booted. In Integrity systems, this EMS port is tunneled into the
management processor and is accessible from the management LAN or management
serial port.
Firmware Redirection
As soon as the server powers on, the system firmware is responsible for configuring all of the
hardware and then loading EFI (Extensible Firmware Interface). This phase can also be
called FW or BIOS console redirection. EFI is the FW command line that can be used to
prepare the system for OS install or choose an OS to boot.
The system uses a common serial port standard for this purpose and initializes all of the
system ACPI (Advanced Control and Power Interface) variables to identify this port for use
as the EMS port. This port is used by the boot loader and OS for all EMS communication.
The user can alter these default settings if they wish using the boot loader menus.
Special Administration Console
The Special Administration Console (SAC) runs on top of the EMS. The SAC prompt provides
a basic set of commands to manage the setup, installation, and repair of the OS. These
commands allow the user to examine logs, shutdown or reboot, kill processes or change
process priority, and set network parameters.
The connection for the SAC is directly into the kernel and is not dependent on the health of
any user code or of any device driver. This means that a user has more tools available
repair an un-healthy system that many be unresponsive from the GUI. This direct-to-kernel
path is similar to the kernel debugger and is always available.
From the SAC prompt, the user can create and use a standard Windows command line.
During setup, the SAC also automatically starts three setup channels so the user can
monitor installation progress. A subset of commands is available for use when the system is
in distress. This is known as the !SAC prompt.
The SAC and !SAC prompts are primarily used for setup, or to bring a distressed system back
to health so that in-band tools such as Remote Desktop can be used.
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