Maximum Temperatures In The External I/O Expansion Unit - Sun Microsystems SPARC Enterprise T5120 Installation And Service Manual

Temperature sensors are also located inside the I/O boats. FRU ID circuits are located
on the link cards, the PSUs, the I/O boats, and on the chassis centerplane.
Temperature data and FRU ID information is available on an I2C bus (Inter-IC bus)
in the External I/O Expansion Unit and the link cards.
The service processor in the host system can monitor the I2C bus in the External I/O
Expansion Unit. The service processor can power down the External I/O Expansion
Unit if parameters exceed maximum limits.
There is no service processor in the External I/O Expansion Unit itself.
For examples of software commands, see
1.6.1 Maximum Temperatures in the External I/O
Expansion Unit
TABLE 1-2
Unit. The table also includes error messages that the host might display if these
temperatures exceed the maximum values.
Maximum Temperatures
TABLE 1-3
Temperature Where Measured
38˚C (100˚F) At the intake of the PSU
54˚C (130˚F) Inside the PSU
60˚C (140˚F) Inside the I/O boat
65˚C (150˚F) Inside the I/O boat
1-36 External I/O Expansion Unit Installation and Service Manual for SPARC Enterprise T5xxx Servers • April 2011
summarizes the maximum temperatures for the External I/O Expansion
Comments
The error message is:
Ext info /SYS/IOX@nnnn/PSn THERMCTRL/T_AMBIENT has
exceeded high warning threshold
The error message is:
Ext info /SYS/IOX@nnnn/PSn THERMCTRL/T_HOTSPOT has
exceeded high warning threshold
Note: The PSU can turn itself off if its internal temperature
exceeds this value.
The error messages are:
Ext info /SYS/IOX@nnnn/IOBn THERMCTRL/T_CHIP has
exceeded high warning threshold
Ext info /SYS/IOX@nnnn/IOBn THERMCTRL/T_HOTSPOT has
exceeded high warning threshold
The error messages are:
Ext info /SYS/IOX@nnnn/IOBn THERMCTRL/T_CHIP has
exceeded high critical threshold
Ext info /SYS/IOX@nnnn/IOBn THERMCTRL/T_HOTSPOT has
exceeded high critical threshold
Appendix C.