C H A P T E R 6

Checking LEDs

This chapter describes the front and back panel LEDs, which display the operating status of all drives and modules. Topics covered in this chapter are:

Section 6.1, LEDs When The Array Is First Powered On

Section 6.2, Front Panel LEDs

Section 6.2.1, Drive LED Status

Section 6.2.2, Correcting SES or PLD Firmware Version Conflicts

Section 6.3, Back Panel LEDs

Section 6.3.1, I/O Controller Module and Battery Module LEDs

Section 6.3.2, I/O Expansion Module LEDs

Section 6.3.3, Power Supply and Fan Module LED

For troubleshooting flowcharts related to LEDs, see Section 8.7, Troubleshooting Flowcharts.

6.1 LEDs When The Array Is First Powered On

With the array powered on but not connected to a server, you should see the LED conditions described in TABLE 6-1.

TABLE 6-1 Front Panel LED Status When Array Is First Powered On
LED Location	LED Condition
Drive LEDs	Solid green, if media scan off Blinking green, if media scan on
Chassis ear LEDs	Solid green

Note - Whenever media scan is running on a drive, its front-panel LED flashes green. It is normal for front-panel drive LEDs to flash green while media scan is running. Media scan is disabled by default. It can be enabled to start when the array is powered up. For more information, refer to the Sun StorEdge 3000 Family RAID Firmware User's Guide.

6.2 Front Panel LEDs

The drive LEDs are located between the rows of drives on the front panel, as shown in FIGURE 6-1. The system operation LEDs are located on the right ear of the chassis and shown in FIGURE 6-2.

FIGURE 6-1 Front Panel LEDs

Figure shows the LEDs on the front panel.

FIGURE 6-2 shows the chassis ear LEDs and reset push button. Use a paper clip to push the Reset button to silence a failed component alarm. See Section 8.2, Silencing Audible Alarms for more information about silencing audible alarms.

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

Figure shows the Reset push button and the power, fan, temp, and event LEDs.

TABLE 6-2 lists the front panel LEDs and describes LED activity.

TABLE 6-2 Front Panel LEDs
LED	LED Color	Description
Drive	Solid green	Good: Drive power-up and spin-up OK.
	Blinking green	Good: Indicates drive activity.
	Solid amber	Failed: Drive failure.
Power (Light bulb icon) 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	Good: Power supply good.
	Solid amber	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	Good: Both fans are rotating at 4000 RPM or higher.
	Solid amber	Faulty/Failed: One or both fans is rotating at less than 4000 RPM.
Temp (Thermometer icon) Monitors the temperature level and indicates violations of the internal temperature threshold of 131°F (55°C).	Solid green	Good: Under temperature threshold.
	Solid amber	Failed: Over temperature threshold.
Event (Caution icon) Indicates any abnormal or failure event in the I/O board.	Solid green	Normal operation of I/O board.
	Solid amber	Failed I/O board.
	Blinking amber	Indicates that the version of the SES firmware or associated hardware PLD code on one controller does not match that on the other controller.

Note - To test that the LEDs work, using a paper clip, press and hold the Reset button for five 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.

6.2.1 Drive LED Status

The drive LED color changes based on array events. For example, when a media scan is performed, to indicate an event is taking place, the drive LEDs blink green for the physical drives that compose the logical drive that is being scanned. The following table lists the events that influence the drive LED status.

TABLE 6-3 Drive LED Status
LED Status	Event	Description
Solid green	No error	A drive is working as expected.
Blinking green	Media scan	A logical drive is created, or the controller is reset, and media scan is enabled.
Blinking green	Drive activity	A drive is processing I/O.
Amber	Drive fault	A drive fails.
Amber	Identify	The Sun StorEdge CLI `set led` command is run, or the firmware application, "Flash All SCSI Drives" option is used.

Note - The media scan feature sequentially checks each physical drive in a selected logical drive, block by block, for bad blocks. When media scan is running on a drive, its front-panel LED flashes green. By default, media scan is disabled. You can run media scan on a logical drive manually, or set media scan to always run when you power up the array. For more information about the media scan feature, refer to the Sun StorEdge 3000 Family RAID Firmware User's Guide.

6.2.2 Correcting SES or PLD Firmware Version Conflicts

When you replace an I/O controller, the new controller might have a version of SES or PLD firmware different from the other controller in your array. If this mismatch occurs, when you install a controller you hear an audible alarm and see a blinking amber event LED, and an SES event message is sent.

A similar situation occurs when you add an expansion unit or JBOD and there is a mismatch between the SES or PLD firmware of the RAID array and that of the expansion unit, or between two expansion units.

See Section 7.4.4, Upgrading SES and PLD Firmware for information about upgrading SES and PLD firmware.

6.3 Back Panel LEDs

The back panel LED colors indicate the conditions described in the following figures and tables.

6.3.1 I/O Controller Module and Battery Module LEDs

FIGURE 6-3 shows the Sun StorEdge 3510 FC Array I/O controller module and the LEDs on its back panel. FIGURE 6-4 shows the Sun StorEdge 3511 SATA Array I/O controller module and the LEDs on its back panel.

FIGURE 6-3 Sun StorEdge 3510 FC Array I/O Controller Module and Battery Module LEDs

Figure shows the Sun StorEdge 3510 FC Array I/O controller module and its LEDs.

FIGURE 6-4 Sun StorEdge 3511 SATA Array I/O Controller Module and Battery Module LEDs

Figure shows the Sun StorEdge 3511 SATA Array I/O controller module and its LEDs.

Note - Although an amber light on the back panel often indicates a faulty component, a steady amber light on the Ethernet link LED indicates normal Ethernet activity. See TABLE 6-4 for more information.

The I/O controller module and battery module LEDs and their color definitions are shown in TABLE 6-4.

TABLE 6-4 I/O Controller Module and Battery Module LEDs
LED	Purpose	LED Color Description
Battery	Status of battery	Solid green - Battery charged Blinking green - Battery charging Solid amber - Battery failed or missing
I/O Activity	I/O activity of host and disk ports	Off - Not busy (no I/O activity) Blinking green - Busy (active I/O)
Cache	Status of memory cache	Off - Clean cache Blinking green - Dirty cache; data is in memory and is not written to disk yet
Ethernet link (active controller)	Status of Ethernet link	Solid amber - Active link Off - Inactive connection
Ethernet link (inactive controller)	Status of Ethernet link	Off - Active connection on inactive controller, or inactive connection
Ethernet active	Status of Ethernet activity	Blinking green - Busy
RAID controller status	Status of controller on I/O controller module	Blinking green - Good (primary controller) Solid green - Good (secondary controller) Solid amber - Failed RAID controller or I/O module
SFP link status (L)	SFP link status	Solid green - Active good FC Connection Off - Empty, no FC connection, or failed FC connection
SFP speed (S)	SFP speed	Solid green - 2 Gbit Off - 1 Gbit

Note - The batteries in controller FRUs experience discharge during shipment and might require an extended charging cycle upon initial power-up. Nominal battery operation is achieved when the battery status LED changes from amber to flashing green within 25 minutes after the initial power cycle. If the battery status LED remains amber for more than 25 minutes after the initial power-up, then the unit must be power cycled to initiate the extended charging cycle. If the battery status LED remains amber for more than 30 minutes after initiating the extended charging cycle, contact Sun service personnel for additional instructions.

Ethernet link LEDs on Sun StorEdge 3510 FC arrays and Sun StorEdge 3511 SATA arrays differ from the Ethernet link LEDs found on Sun StorEdge 3310 SCSI arrays and Sun StorEdge 3320 SCSI arrays. On Sun StorEdge 3510 FC arrays and Sun StorEdge 3511 SATA arrays, a connected port's Ethernet link LED glows solid amber only on the active controller, because the Ethernet port on an FC array is considered active only if its controller is active. On an inactive controller, a port's Ethernet link LED is off whether the port is connected or not. The absence of a solid amber light on a connected port's Ethernet link LED indicates that this controller is not the active controller.

6.3.2 I/O Expansion Module LEDs

FIGURE 6-5 and FIGURE 6-6 show I/O expansion modules and their LEDs for the Sun StorEdge 3510 FC expansion unit and the Sun StorEdge 3511 SATA expansion unit.

FIGURE 6-5 I/O Expansion Module for a Sun StorEdge 3510 FC Expansion Unit

Drawing shows the I/O Expansion Module for a Sun StorEdge 3510 FC Expansion Unit.

FIGURE 6-6 I/O Expansion Module for a Sun StorEdge 3511 SATA Expansion Unit

Drawing shows the I/O Expansion Module for a Sun StorEdge 3511 SATA Expansion Unit.

The I/O expansion module LEDs and their color definitions are shown in TABLE 6-5.

TABLE 6-5 I/O Expansion Module LEDs
LED	Purpose	LED Color Description
I/O Activity	I/O activity of host and disk ports	Off - Not busy (no I/O activity) Blinking green - Busy (active I/O)
I/O module status	Status of I/O module	Solid green - Power-up successful and SES chip has successfully read on-board temperature and voltage sensors Amber - Expansion unit powering up, or failed voltage or temperature sensor Off - Expansion unit is not powered up
SFP link status (L)	SFP link status	Solid green - Active good FC Connection Off - Empty, no FC connection, or failed FC connection
SFP speed (S)	SFP speed	Solid green - 2 Gbit Off - 1 Gbit

6.3.3 Power Supply and Fan Module LED

FIGURE 6-7 and FIGURE 6-8 show the AC and DC power supply and fan modules and their LEDs.

FIGURE 6-7 AC Power Supply and Fan Module

Figure shows AC power supply and fan module.

FIGURE 6-8 DC Power Supply and Fan Module

Figure shows DC power supply and fan module.

TABLE 6-6 describes the power supply and fan module LED.

TABLE 6-6 Power Supply and Fan Module LED
LED Purpose	LED Color	Description
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	Good: Power supply and fans are good. Failed: One or more output voltages out of range or one or both fans is rotating at less than 4000 RPM.