Cooling Subsystem Behavior; Troubleshooting The I/O; I/O Subsystem Behaviors; Customer Messaging Policy - HP Carrier-Grade rx2800 i2 Server DC User's & Service Manual

for the fan cooling zone it controls. Each dual fan assembly CRU is identified by the server as fans
1 through 6 both for logging purposes and for fault identification on the diagnostic LED panel.
Cooling fan CRU failures are identified visually by a single green LED on the dual fan assembly
CRU that is turned on when one or both of the fans fail; logged as an IPMI event by fan sensor
logic; and identified as a fan assembly CRU failure by iLO 3 turning on the appropriate LEDs on
the System Insight Display panel.

Cooling subsystem behavior

The iLO 3 controls fan speed on ambient air temperatures, chip temperatures, server configuration,
and fan operation or failure. Air is drawn through the front of the server and pushed out the rear
by the cooling fans. You can display fan status remotely with the iLO 3 MP ps command.
Within the server, temperature sensors report server temperatures to iLO 3, which controls fan
speed based on this information.
Table 31 Cooling subsystem events that illuminate SID LEDs
Diagnostic
LEDs
Fans (1-6)
Fans (1-6)

Troubleshooting the I/O

This subsection provides information on troubleshooting issues with the public PCIe slots.

I/O subsystem behaviors

The main role of the I/O subsystem is to transfer blocks of data and instruction words between
physical shared memory and virtual memory (system disks or disk array). The system boot is the
first time blocks of data and instructions are transferred into physical memory from a local disk or
DVD or over the network. This process is referred to as Direct Memory Access (DMA) and is initiated
by I/O devices located in I/O or on Host Bus Adapter (HBA) I/O cards and does not involve any
logical processors.

Customer messaging policy

See the SEL for any action from low level I/O subsystem faults, because the System Insight
Display may not have any illuminated LEDs.
For configuration-type errors, for example, no iLO 3 MP or core I/O HBAs installed or working,
see "Supported configurations" (page 75)
Some diagnostic messages are reported for high level I/O subsystem errors. All fatal I/O
subsystem errors cause global MCAs.
Sample IPMI Events
Type 02h, 0Ah:07h:01h
COOLING_UNIT_WARNING
Type 02h, 0Ah:07h:02h
COOLING_UNIT_FAILURE
Cause Source
Fan has either iLO 3
previously failed or
is degrading
Fan has failed and iLO 3
no longer meets
minimum
requirements
for actions.
Notes
Cleared when fan is
replaced
Cleared when fan is
replaced
Troubleshooting the I/O 85