Chapter 2 ILOM Platform Features for the Sun Fire X4170, X4270, and X4275 Servers 19
TABLE 2-1 shows how the /SYS/INTSW sensor and the
/SYS/SP/SP_NEEDS_REBOOT sensor work together to indicate the state of the
server.
Sensors Reference Information
The server includes several of sensors that report on hardware conditions. Many of
the sensor readings are used to adjust the fan speeds and perform other actions, such
as illuminating LEDs and powering off the server.
This section describes the sensors that ILOM monitors for the Sun Fire X4170, X4270,
and X4275 Servers.
The following types of sensors are described:
■ “Temperature Sensors” on page 20
■ “Power Supply Fault Sensors” on page 20
■ “Fan and Security Sensors” on page 21
■ “Power Supply Unit Current, Voltage, and Power Sensors” on page 22
■ “Entity Presence Sensors” on page 22
TABLE 2-1 Server Condition as Indicated by the /SYS/INTSW and
/SYS/SP/SP_NEEDS_REBOOT Sensors
/SYS/INTSW /SYS/SP/SP_NEEDS_REBOOT Server Condition
De-asserted De-asserted Normal system state.
Asserted Asserted The server’s top cover was opened while the
SP was running. The server’s DIMM
inventory can no longer be considered valid
so the SP is placed in a degraded mode of
operation. This condition can also be caused
by a misaligned chassis intrusion switch or
an improperly seated cover.
De-asserted Asserted The server’s top cover has been replaced,
but the SP was not subsequently rebooted.
The server’s DIMM inventory can no longer
be considered valid so the SP is placed in a
degraded mode of operation. The SP needs
to be rebooted while the host power is held
off before the DIMM inventory will be valid.
Note - The server’s host can be powered on
in this state.
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