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The power supply in the A100 has an LED used to communicate the power supply's current status.
The LED colors and patterns used, and the active/standby behavior of the power supplies themselves, are different than in other types of Isilon node. This may cause confusion. LED state depends on how the power supply is configured.
The A100 power supply LED is bi-colored, green and amber. It has four possible states: solid green, flashing green, solid amber and flashing amber. A green LED means that the power supply state is normal. An amber LED indicates an abnormal state. Below is the detailed explanation of each state. Solid green this means that the power supply is active and its status is normal. One power supply should always be in this state, and the other should be in the 'cold redundant' state - see below. NOTE: In some rare cases, both power supplies on an A100 node may simultaneously show the 'solid green' state. This is due to a configuration issue that must be resolved - contact Dell Technical Support for assistance and reference this KB article. Blinking green this means that the power supply is in the 'cold redundant' state. Unlike other Isilon node families, the A100 does not load-balance its input power over both power supplies. One power supply is designated 'active' and used to power the node, while the other power supply goes into a cold standby mode. The node periodically alternates the active and cold redundant power supply automatically to ensure that wear is spread evenly across both power supplies over time. When this occurs, the solid green and blinking green LEDs trade places. If the active power supply fails, the standby power supply automatically takes over and continues supplying power to the node. Solid amber - the power supply has detected a critical abnormal condition that prevents it from operating normally. Possible causes are an unplugged power cord, input power frequency, or voltage outside the normal range ( 47-63 Hz, 100-240V) or the power supply may have failed. Blinking amber - the power supply has detected a non-critical abnormal condition such as high temperature, abnormal internal voltage or current readings, or a PSU fan speed issue . The power supply is continuing to operate but depending on the nature of the condition detected by the PSU, failure may be imminent if the issue is not addressed. If the power supply LED indicates an abnormal condition, useful information about the nature of the issue can often be found in the /var/log/messages log file. Also, the following command can be used to verify the power supply state: # isi_hw_status NOTE: A power supply in the cold redundant state shows zero or very low values on voltage, current, and fan sensors in isi_hw_status output . This is normal as the power supply is inactive. Example output, with relevant lines highlighted in bold : isi_hw_status SerNo: FCXXXXXXXXXXX4 Config: 105-000-310-00 FamCode: A ChsCode: 1U GenCode: 00 Product: A100-1U-Dual-16GB-4x1GE-600GB Comps: Chassis CPU Motherboard NVRam FlashDrive Disk_Controller Disk_Expander Power_Supplies Chassis: EMC8 (EMC (Kylin) 8-Bay Chassis) CPU: GenuineIntel (2.00GHz, stepping 0x000206d7) PROC: Dual-proc, Hexa-core RAM: 274803945472 Bytes Mobo: IntelS2600GZ (Intel S2600GZ Motherboard) NVRam: None (No NVRAM supported) (0B card) (size 0B) FlshDrv: None (No physical dongle supported) ((null)) DskCtl: LSI2308SAS2 (LSI 2308 SAS Controller) (8 ports) DskExp: NONE (No Disk Expander Support) PwrSupl: PS1 (type=Delta, fw=N/S, pri=N/S, sec=N/S, pri_id=N/S, sec_id=N/S) PwrSupl: PS2 (type=Delta, fw=N/S, pri=N/S, sec=N/S, pri_id=N/S, sec_id=N/S) ChasCnt: 1 (Single-Chassis System) NetIF: ib1,ib0,igb0,igb1,igb2,igb3 IBType: MT4099 QDR (Mellanox MT4099 IB QDR Card) LCDver: Unknown (Unknown(0)) IMB: Board Version 0xffffffff Power Supply 1 good Power Supply 2 good CPU Operation (raw 0x88360800) = Normal CPU Speed Limit = 100.00% System Fan 1A = 15190.000 System Fan 1B = 14940.000 System Fan 2A = 15004.000 System Fan 2B = 15120.000 System Fan 3A = 5642.000 System Fan 3B = 5940.000 System Fan 4A = 5642.000 System Fan 4B = 5940.000 System Fan 5A = 5704.000 System Fan 5B = 5940.000 System Fan 6A = 5642.000 System Fan 6B = 5940.000 BB +12.0V = 11.883 BB +5.0V = 4.959 BB +3.3V = 3.239 BB +5.0V STBY = 4.937 BB +3.3V AUX = 3.296 BB +1.05Vccp P1 = 0.816 BB +1.05Vccp P2 = 0.798 BB +1.5 P1MEM AB = 1.495 BB +1.5 P1MEM CD = 1.495 BB +1.5 P2MEM AB = 1.495 BB +1.5 P2MEM CD = 1.495 BB +1.8V AUX = 1.760 BB +1.1V STBY = 1.066 BB +3.3V Vbat = 2.983 BB +1.35 P1LV AB = na BB +1.35 P1LV CD = na BB +1.35 P2LV AB = na BB +1.35 P2LV CD = na PS1 Input Power = 200.000 PS2 Input Power = 0.000 BB P1 VR Temp = 24.000 Front Panel Temp = 21.000 SSB Temp = 43.000 BB P2 VR Temp = 28.000 BB Vtt 2 Temp = 28.000 BB Vtt 1 Temp = 29.000 I/O Mod Temp = na HSBP 1 Temp = 23.000 SAS Mod Temp = 26.000 Exit Air Temp = 31.000 LAN NIC Temp = 44.000 PS1 Temperature = 29.000 PS2 Temperature = 29.000 P1 Therm Margin = -54.000 P2 Therm Margin = -53.000 P1 DTS Therm Mgn = -54.000 P2 DTS Therm Mgn = -53.000 P1 VRD Hot = no reading P2 VRD Hot = no reading P1 Mem01 VRD Hot = no reading P1 Mem23 VRD Hot = no reading P2 Mem01 VRD Hot = no reading P2 Mem23 VRD Hot = no reading DIMM Thrm Mrgn 1 = -46.000 DIMM Thrm Mrgn 2 = -52.000 DIMM Thrm Mrgn 3 = -45.000 DIMM Thrm Mrgn 4 = -55.000 Agg Therm Mgn 1 = -26.000 MIC 1 Margin = na MIC 2 Margin = na
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