1-38
External I/O Expansion Unit for SPARC Enterprise M
x
000 Servers Installation and Service Manual • April 2011
Note –
On the optical link card, the LEDs for link card data and link card
management are located next to the optical cable sockets. Although the LEDs are
near the sockets, they do not have any direct relationship to the sockets and are not
intended to indicate the activity of the optical cable sockets.
1.6
System Management
The PSUs contain temperature sensors. The PSUs can shut down automatically if
they detect an extreme temperature. The PSUs also have sensors for voltage and
current levels.
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.
The
ioxadm
command is available on the host system to display External I/O
Expansion Unit sensor information and LED states. You can also use
ioxadm
to
control the Locate LEDs in the External I/O Expansion Unit and to power on or off
FRUs in the External I/O Expansion Unit. Refer to the
ioxadm
(8) man page for more
information.
For examples of software commands, see
5
I/O boat 0 ready to remove
12
Link card management
6
I/O boat 0 fault/locate
13
Slot attention/locate (all PCI carriers)
7
I/O boat 0 DC power
14
Slot power (all PCI carriers)
Figure Legend
Summary of Contents for SPARC Enterprise M4000
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