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2-20 SPARC Enterprise M8000/M9000 Servers Service Manual • June 2010
2.3.4 Switch
The operator panel has the mode switch, which sets the operation mode, and the
POWER switch, which is used to power on and off the system.
TABLE 2-3 Switches (Operator Panel)
Switch Name Description of function
Mode This key switch is used to set an operation mode for the server.
Insert the special key that is under the customer’s control, to
switch between modes.
Locked Normal operation mode
• The system can be powered on with the POWER switch, but
it cannot be powered off with the POWER switch.
• The key can be pulled out at this key position.
Service Mode for maintenance
• The system can be powered on and off with the POWER
switch.
• The key cannot be pulled out at this key position.
• Maintenance is performed in Service mode while the server
is stopped.
POWER This switch is used to control the server power.
Power-on and power-off are controlled by pressing this switch
in different patterns, as described below.
Holding down for a
short time
(less than 4 seconds)
Regardless of the mode switch state, the server (all domains) is
powered on.
At this time, processing for waiting for facility (air
conditioners) power-on and warm-up completion is
skipped.(*1)
Holding down for a
long time in Service
mode
(4 seconds or
longer)
• If power to the server is on (at least one domain is
operating), shutdown processing is executed for all domains
before power-off processing.
• If the system is being powered on, the power-on processing
is cancelled, and the system is powered off.
• If the system is being powered off, the operation of the
POWER switch is ignored, and the power-off processing is
continued.
Note – *1)In normal operation, the server is powered on only when the computer
room environmental conditions satisfy the specified values. Then, the server
remains in the reset state until the operating system is booted.