C H A P T E R 6

Checking LEDs

This chapter describes the front- and rear-panel LEDs, which give the clear status of the operation of all drives and modules. Topics covered in this chapter are:

LEDs When Array Is First Powered On

Front-Panel LEDs

Rear-Panel LEDs

6.1 LEDs When Array Is First Powered On

With the array powered up without the SCSI bus configuration cable installed while the array is not connected to a server, you should see the LED conditions described in TABLE 6-1 and TABLE 6-2.


Drive LEDs	Solid green
Chassis ear LEDs	Solid green


I/O Module:
ERROR LED	Blinking green (no bus configuration; invalid state)
TERM LED	Solid green (autotermination enabled)
SNGL LED	Inactive (no bus configuration; invalid state)
Controller Module:
ACTIVITY LED	(Inactive (controller not busy)
Center LED (status symbol)	Slow blinking green: good primary controller Solid green: good secondary controller
Right LED (battery symbol)	Blinking green if battery is charging Solid green if battery is fully charged
Ethernet port LEDs	Inactive
Power/fan module LEDs	Solid green
Event module LEDs	Solid green

6.2 Front-Panel LEDs

The drive LEDs are located between the rows of drives on the front panel (see following figure). The system operation LEDs are located on the right ear of the chassis.

FIGURE 6-1 Front Panel LEDs

Figure showing the LEDs on the front panel.

The following figure shows the front panel LEDs and the Reset button.

Use a paperclip to push the Reset button to silence a failed component alarm. See Silencing Audible Alarms for more information about silencing audible alarms.

FIGURE 6-2 Chassis Ear LEDs and Reset Button on Front Panel

Photograph showing the Reset pushbutton and following LEDs: power, fan, temp, and event

The following table lists the front-panel LEDs.


LED	LED Color	Description
Drive	Solid green Blinking green Solid amber	Good: Drive power-up and spin-up OK. Good: Drive activity. Failed: Drive failure.
Power (Light bulb icon) Monitors the DC output voltage within tolerance specification. Overcurrent protection shutting down any voltage output displayed. Voltage thresholds: +5 VDC +/-.25 VDC +12 VDC +/-.6 VDC Current thresholds: +5 VDC 35A +12 VDC 25A	Solid green Solid amber	Power supply good. Failed: One or more output voltages out of range.
Fan (Fan icon) Monitors the fan speed within nominal operational RPM specification of 5000 RPM.	Solid green Solid amber	Good: Over 900 RPM. Faulty: Failed: Under 900 RPM.
Temp (Thermometer icon) Monitors the temperature level and indicates overtemp status.	Solid green Solid amber	Good: Normal temperature. Failed: Temperature over threshold.
Event (Caution icon) Indicates any abnormal or failure event in the EMU.	Solid green Solid amber	Normal operation of EMUs. Abnormal event EMU.

See Sun StorEdge 3310 Temperature Sensor Locations for a description of temperature sensors and their locations.

Note - To test that the LEDs work, using a paperclip, press and hold the Reset button for 5 seconds. All the LEDs should change from green to amber when you perform this test. Any LED that fails to light indicates a problem with the LED. When you release the Reset button, the LEDs return to their initial state.

6.3 Rear-Panel LEDs

The rear-panel LED colors indicate the conditions described in the following figures and tables. The following figure is the rear-panel with LEDs.

FIGURE 6-3 Rear-Panel LEDs

Figure showing the rear view of a RAID array, its modules and the LEDs.

If you see a blinking green or amber LED, you might have an incorrect configuration or a failed component.

6.3.1 RAID Controller LEDs

The following figure shows the RAID controller LEDs on the rear panel.

FIGURE 6-4 RAID Controller LEDs

Figure showing RAID controller module and its LEDs.

The following table lists the RAID Controller LEDs.


LED	Color	Status
Activity LED	LED inactive	Not active.
	Blinking green	Controller is busy.
	Solid green	Controller data is in cache.
	Solid amber	Power is lost and data is in memory.
Center LED (status symbol)	Slow-blinking green Solid green Solid amber	Good: primary controller. Good: secondary controller. Failed controller.

Right LED (battery symbol)	Blinking green Solid green Solid amber	Battery is charging. Battery is fully charged. Battery failed.

Ethernet 10/100 BASE-T LEDs (left and right corners of the connector)	Amber Blinking green	Ethernet link is connected and working. Ethernet link is transmitting or receiving data.

6.3.2 Other Rear-Panel LEDs

The following table lists the other rear-panel module LEDs.


Module	LED Color	Status
Power supply/fan Monitors the DC output voltage within tolerance specification. Overcurrent protection shutting down any voltage output is also displayed. Voltage thresholds: +5 VDC +/-.25 VDC +12 VDC +/-.6 VDC Current Thresholds: +5 VDC 35A +12 VDC 25A	Solid green Solid amber Solid green Solid amber	Power supply good. Failed: one or more output voltages out of range. Good fan: Over 900 RPM. Faulty/failed: Under 900 RPM.
EMU module	Solid green Solid amber	Good EMU module. Failed EMU module.
I/O module TERM LEDs ERROR LED SNGL LED	Solid green Inactive LED Blinking green Solid amber Inactive LED Solid green Inactive LED	Autotermination enabled. Autotermination disabled. Invalid single- or dual-cable configuration. Failed I/O module. Valid single- or dual-bus configuration, and I/O module is good. Cabled for single-bus configuration or no configuration. Cabled for dual-bus configuration.

The AC and DC power supply and fan modules have a single LED.

FIGURE 6-5 AC Power Supply and Fan Module

Figure showing AC power supply and fan module.

FIGURE 6-6 DC Power Supply and Fan Module

Figure showing DC power supply and fan module.

The I/O modules for a RAID array and for the expansion units have TERM, ERROR, and SNGL LEDs.

FIGURE 6-7 I/O Module for a RAID Array

Figure showing SCSI I/O Module for a RAID Array.

The following figure illustrates the I/O Module for the Expansion Unit.

FIGURE 6-8 I/O Module for an Expansion Unit

Drawing showing I/O Module for an Expansion Unit.

The EMU module has a single LED.

FIGURE 6-9 EMU Module