Intel SR2500 Ficha de datos descargar pdf (Pagina 32)

Cooling Subsystem Intel® Server System SR2500AL

Revision – 1.00

Intel order number D31980-004

3. Cooling Subsystem

Several components and configuration requirements make up the cooling sub-system of the

chassis. These include the system fan module, the power supply fans, air baffles, CPU air duct,

and drive bay population. All are necessary to provide and regulate the air flow and air pressure

needed to maintain the system’s thermals when operating at or below maximum specified

thermal limits. See Table 55. System Environmental Limits.

Two system fan assembly options are available for this chassis. The first option is a non-

redundant three fan solution providing sufficient airflow to maintain internal system thermal

requirements when the external ambient temperature remains within specified limits. The

second option is a redundant fan solution. Three parallel sets of fans are arranged in series to

provide redundant cooling in the event of a single fan failure. Each cooling option utilizes two

fan types: a 60mm variable speed fan and an 80mm variable speed fan.

The chassis uses a variable fan speed control engine to provide adequate cooling for the

system at various ambient temperature conditions, under various server workloads, and with the

least amount of acoustic noise possible. The fans operate at the lowest speed for any given

condition in order to minimize acoustics. The Baseboard Management Controller (BMC)

integrated on the Intel

Server Board S5000PAL is used for the variable fan speed control

function. The controller monitors selective component temperatures and the ambient

temperature, as well as each fan’s RPM to determine the necessary airflow. The BMC sets the

fan speeds to the appropriate RPM in order to maintain proper cooling. The BMC controller will

also log errors into the System Event Log (SEL) when temperature sensors exceed their safe

operating ranges, or if any of the fans fail to operate at safe airflow speeds. In the event of a

fan failure, the BMC will boost the remaining fans to compensate for the lost air flow. A chassis

with redundant fans can continue to operate in this degraded condition while the non-redundant

chassis may not. If the cooling is not sufficient under a failed fan condition, the system will

eventually shutdown to protect itself from thermal damage.

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