Kontron S5500 SEL Troubleshooting Uživatelský manuál stáhnout pdf (Strana 41)

Cooling subsystem System Event Log Troubleshooting Guide for Intel® S5500/S3420 series Server Boards

32 Intel order number G74211-001 Revision 1.0

Table 28: Fan Speed Sensor – Event Trigger Offset – Next Steps

Event Trigger Offset

Assertion

Severity

Deassert

Severity

Description

Next Steps

Hex

Description

00h

Lower non critical

going low

Degraded

The fan speed has dropped below

its lower non critical threshold.

A fan speed error on a new system build is typically not caused by the fan

spinning too slowly, instead it is caused by the fan being connected to the wrong

header (the BMC expects them on certain headers for each chassis and will log

this event if there is no fan on that header).

1. Refer to the Quick Start Guide or the Service Guide to identify the correct

fan headers to use.

2. Ensure the latest FRUSDR update has been run and the correct chassis

was detected or selected.

3. If you are sure this was done, the event may be a sign of impending fan

failure (although this would only normally apply if the system has been in

use for a while). Replace the fan.

02h

Lower critical

going low

non-fatal

Degraded

The fan speed has dropped below

its lower critical threshold.

5.1.2 Fan Presence and Redundancy Sensors

Fan presence sensors are only implemented for hot-swap fans, and require an additional pin on the fan header. Fan redundancy is an

aggregate of the fan presence sensors and will warn when redundancy is lost. Typically the redundancy mode on Intel

servers is an n+1

redundancy (if one fan fails there are still sufficient fans to cool the system, but it is no longer redundant) although other modes are also

possible.

Table 29: Fan Presence Sensors Typical Characteristics

Byte

Field

Description

Sensor Type

04h = Fan

Sensor Number

40h – 45h (Chassis specific)

1 2 ... 36 37 38 39 40 41 42 43 44 45 46 ... 113 114

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