Thermal Management; Thermal Operation And Configuration Requirements; Thermal Management Overview; Thermal Sensor Input For Fan Speed Control - Intel JBOD2312S3SP Hardware Manual

5 Thermal Management

The Intel ® Storage System JBOD2312S3SP is designed to operate at external ambient temperatures of
between 10ºC and 35ºC with limited excursion-based operation up to 45ºC and limited performance impact.
Working with integrated platform management, several features within the system are designed to move air
in a front-to-back direction, through the system and over critical components to prevent them from
overheating and allow the system to operate with best performance.
The installation and functionality of several JBOD components are used to maintain system thermals. They
include up to three managed 60-mm system fans and one integrated 40-mm fan for each installed power
supply module. Hard drive carriers can be populated with a hard drive or supplied drive blank.

5.1 Thermal Operation and Configuration Requirements

To keep the system operating within supported maximum thermal limits, the system must meet the
following operating and configuration guidelines:
The system operating ambient is designed for sustained operation up to 35ºC (ASHRAE Class A2)

with short-term excursion-based operation up to 45ºC (ASHRAE Class A4).
The system can operate up to 40ºC (ASHRAE Class A3) for up to 900 hours per year.
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The system can operate up to 45ºC (ASHRAE Class A4) for up to 90 hours per year.
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System performance may be impacted when operating within the extended operating
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temperature range.
There is no long-term system reliability impact when operating at the extended temperature
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range within the approved limits.
All hard drive bays must be populated. Hard drive carriers can be populated with a hard drive or

supplied drive blank.
In single power supply configurations, the second power supply bay must have the supplied filler

blank installed at all times.
The system must be configured with dual power supplies for the system to support fan redundancy.

The system top cover must be installed at all times when the system is in operation. The only

exception to this requirement is to hot replace a failed system fan, in which case the top cover can be
removed for no more than three minutes at a time.

5.2 Thermal Management Overview

In order to maintain the necessary airflow within the system, all of the previously listed components and top
cover need to be properly installed. For best system performance, the external ambient temperature should
remain below 35ºC and all system fans should be operational. The system is designed for fan redundancy
when the system is configured with two power supplies.

5.3 Thermal Sensor Input for Fan Speed Control

The power distribution board uses various sensors as inputs to fan speed control. Some of the sensors are
actual physical sensors and some are virtual sensors derived from calculations. The Front Panel
Temperature Sensor is used as an input to fan speed control.
Intel® Storage Server System JBOD2312S3SP Hardware Guide
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