Sensor Locations; Power Supply Sensors; Cooling Fan Sensors - R/Evolution 2000 Series Troubleshooting Manual

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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 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. Various RAIDar pages

display the sensor information, for example Monitor > Status > Module Status.

The following sections describe each element and its sensors.

Each enclosure has two fully redundant power-and-cooling modules with load-

sharing capabilities. The power supply sensors described in the following table

monitor the voltage, temperature, and fans in each power-and-cooling module. If the

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

input voltage.

Table 6-1 Power Supply Sensors

Description

Power supply 0

Power supply 1

Each power-and-cooling module 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

R/Evolution 2000 Series Troubleshooting Guide • May 2008

Location

Power-and-cooling module 0

Power-and-cooling module 1

Alarm Conditions

Voltage, temperature, or fan fault

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