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Sensor locations, Power supply sensors, Cooling fan sensors – HP StorageWorks 2000fc G2 Modular Smart Array User Manual

Page 51: Temperature sensors, 6 power supply sensors, 7 cooling fan sensor descriptions, 8 controller module temperature sensors

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HP 2312fc and 2324fc Modular Smart Array user guide

51

Sensor locations

The storage system monitors conditions at different points within each enclosure to alert you to problems.

Power, cooling fan, temperature, and voltage sensors are located at key points in the enclosure. In each

controller module and expansion module, the enclosure management processor (EMP) monitors the status

of these sensors to perform SCSI enclosure services (SES) functions.
The following sections describe each element and its sensors.

Power supply sensors

Each enclosure has two fully redundant power supplies with load-sharing capabilities. The power supply

sensors described in the following table monitor the voltage, current, temperature, and fans in each power

supply. If the power supply sensors report a voltage that is under or over the threshold, check the input

voltage.

Cooling fan sensors

Each power supply includes two fans. The normal range for fan speed is 4000 to 6000 RPM. When a

fan’s speed drops below 4000 RPM, the EMP considers it a failure and posts an alarm in the storage

system’s event log. The following table lists the description, location, and alarm condition for each fan. If

the fan speed remains under the 4000 RPM threshold, the internal enclosure temperature may continue to

rise. Replace the power supply reporting the fault.

During a shutdown, the cooling fans do not shut off. This allows the enclosure to continue cooling.

Temperature sensors

Extreme high and low temperatures can cause significant damage if they go unnoticed. Each controller

module has six temperature sensors. Of these, if the CPU or FPGA temperature reaches a shutdown value,

the controller module is automatically shut down. Each power supply has one temperature sensor.
When a temperature fault is reported, it must be remedied as quickly as possible to avoid system damage.

This can be done by warming or cooling the installation location.

Table 6

Power supply sensors

Description

Event/Fault ID LED condition

Power supply 1

Voltage, current, temperature, or fan

fault

Power supply 2

Voltage, current, temperature, or fan

fault

Table 7

Cooling fan sensor descriptions

Description

Location

Event/Fault ID LED condition

Fan 1

Power supply 1

< 4000 RPM

Fan 2

Power supply 1

< 4000 RPM

Fan 3

Power supply 2

< 4000 RPM

Fan 4

Power supply 2

< 4000 RPM

Table 8

Controller module temperature sensors

Description

Normal operating

range

Warning

operating range

Critical operating

range

Shutdown values

CPU temperature

3–88

°C

0–3°C,

88–90°C

> 90

°C

0°C

100°C

FPGA temperature

3–97

°C

0–3°C,

97–100°C

None

0°C

100°C