From 1d039c2b22e09ea4cc2d9b2459909c3e08a090c9 Mon Sep 17 00:00:00 2001 From: Gauthier Provost Date: Thu, 7 Mar 2019 15:29:27 +0800 Subject: [PATCH] Add detailed power consumption measures --- docs/hardware.md | 29 ++++++++++++++++++++++++++++- docs/wol.md | 10 ++++------ 2 files changed, 32 insertions(+), 7 deletions(-) diff --git a/docs/hardware.md b/docs/hardware.md index 97c1ba7..cbddd31 100644 --- a/docs/hardware.md +++ b/docs/hardware.md @@ -6,7 +6,6 @@ ### A388 System-On-Chip ![!Block Diagram](/img/hardware/soc_block_diagram.png) - ## Connector / Interface List ![!Board Legend](/img/hardware/board_legend.jpg) @@ -77,6 +76,34 @@ Helios4 board exposes on header J9 the SoC I2C Bus 1. Below is the header pin-ou ![I2C Pinout](/img/hardware/i2c_pinout.png) +## Power Consumption + +**Board only** + +* Idle : 3.6 Watts +* Active : 5.6 Watts + +**Full Kit (with 4x HDDs)** + +| State | AC calculated
power consumption | DC measured
power consumption | Remarks | +|---------------------|----------------------|----------------------|---------------------| +| Idle | 19.3 W | 16.8 W | | +| HDD Read Access | 27.4 W | 22.8 W | | +| HDD Write Access | 30.3 W | 25.2 W | | +| Standby | 8.0 W | 6.7 W | HDD in Standby mode | +| Suspend-to-Ram | 7.2 W | 6.0 W | HDD in Standby mode | + +!!! note + Measures were done using a Current Clamp Meter on the Helios4 12V DC input. AC Power consumption is calculated based on a AC/DC conversion efficiency of 85%. + + * Meter tool : Extech 380942 - 30A True RMS AC/DC Mini Clamp + * AC/DC Adapter : yczx1268 (efficiency : 85%) + * AC Input Voltage: 220V + * HDD: 4x WD Red 2TB (WD20EFRX) configured as RAID10 + * Network : Connected at 1000Mb/s + * OS: ARMBIAN 5.73 stable Debian GNU/Linux 9 (stretch) 4.14.98-mvebu + + ## HDD Recommendation List We recommend HDD which are designed for NAS (Network Attached Storage). Those NAS HDD are specially conceived for reliable 24/7 operation and offers lower power consumption and dissipation, less vibration and noise, and finally better warranty. We recommend the following models : diff --git a/docs/wol.md b/docs/wol.md index 146f010..03c4876 100644 --- a/docs/wol.md +++ b/docs/wol.md @@ -165,16 +165,14 @@ Measured using Sonoff POW R2 on AC side | Power state | Power (Watt) | Current (Ampere) | Remarks | |---------------|---------------|------------------|---------| -| Idle | 16.18 - 19.87 | 0.14 - 0.17 | | -| Standby | 8.24 - 8.63 | 0.09 - 0.10 | | -| Suspend | 7.46 - 7.71 | 0.07 - 0.08 | | -| Halt/Shutdown | 11.95 | 0.11 | HDDs still active, fans run on full speed | +| Idle | 19.87 | 0.17 | | +| Standby | 8.63 | 0.10 | HDD in Standby mode | +| Suspend | 7.71 | 0.08 | HDD in Standby mode | !!! note * Nominal Input Voltage: 220V * HDD: 4x WD Red 2TB (WD20EFRX) * [I2C OLED screen](/i2c/) attached to the systems - * Variation of power consumption sometimes due to fluctuation of the input voltage ## Issues @@ -190,4 +188,4 @@ Therefore it is advised to always enable WOL (**sudo ethtool -s eth0 wol g**) be When system is put in suspend mode, the PWM feature controlling the fan speed is stopped. The fans will either spin at their lowest speed ([Batch 1 fan](/pwm/#old-fan-batch-1)) or stop spinning ([Batch 2 fan](/pwm/#new-fan-batch-2)). In the latest case, while this is not an issue for the SoC itself which is designed to run with passive cooling, it might have a negative impact on the HDD peripherals because the ambient temperature inside the case will rise. -Therefore it is advised to ensure that when system is suspended the case ambient temperature will not exceed the operating temperature your HDDs are rated for. +**Therefore it is advised to ensure that when system is suspended the case ambient temperature will not exceed the operating temperature your HDDs are rated for.**