Enclosure Monitoring; I 2 C Bus - Infortrend EonStor S12S-G1033 Installation And Hardware Reference Manual

The enclosure is equipped with three (3) redundant, single-fan,
cooling modules. (See the figure above) The LED on each canister
indicates the cooling fan's operating status.
Intelligent Dual Speed Operation
The cooling fans in the cooling modules operate with two rotation
speeds. Under normal operating conditions, the cooling fans run at
the low speed, which is sufficient for maintaining a sufficient airflow
across the components. Under the following conditions, cooling fans
raise their rotation speed to increase the airflow:
˙
Component failure: if one cooling fan in a cooling module, a PSU,
or a temperature sensor fails, the remaining cooling fan(s)
automatically raises its rotation speed.
˙
Elevated temperature: if any of the temperature readings
breaches the upper threshold set for any of the interior
temperature sensors, the cooling fans automatically raise their
rotation speed.
˙
During the subsystem initialization stage, the cooling fans
operate at the high speed and return to low speed once the
initialization process is completed and no erroneous condition is
detected.
NOTE:
There are two value sets for the upper temperature thresholds.
One is set for event notification and the other triggers higher fan
rotation speed. The preset value for event notification can be
changed using the firmware-embedded configuration utility, while
the fan speed trigger is not for user's option. Please refer to the
Firmware Operation Manual for the options with event
notification values.
1.4

Enclosure Monitoring

The enclosure comes with a number of different monitoring methods
that provide you with continual updates on the status of the system
and the individual components. Please check the following for more
details.
2
1.4.1 I C bus
The presence detection circuitry and temperature sensors are
interfaced through a non-user-serviceable I
monitor the presence of PSU modules, cooling modules, and the
internal temperature of the subsystem. If any problem is detected, it
Chapter 1: Introduction
2
C bus. It can be used to
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