2016 NAS: Power Consumption

So, the NAS is complete. I purposely bought low-power hardware – the 35W i3 chip, 5900 RPM NAS drives, 80+ Bronze PSU, etc. It’s time to have a look at what we accomplished.

I got an el-cheapo power meter from Maplins. It claims a 2.5% accuracy rating, which is fine for basic testing. I’m not about to fork out hundreds to see the difference of a watt or two!

So, I booted the NAS, and left it idle for about an hour and looked at the reading:

37W at idle – not bad at all! At this usage, it looks like it will use ~320 kWh per year – so you can calculate the running cost based on your electricity price. For the average UK electricity price, that’s about £34 a year – or £2.84 a month (assuming a fixed tariff).

I used the RockStor GUI to spin the drives down to see what the base system used:

11W is being used by the hard disks – at just under 4W/disk for the Seagate 4TB NAS drives. Not bad at all!

I then loaded up a Plex transcode (to sync to my phone that would take a while) and this is what I saw:

That is 65W. This is the highest value I observed, and is very good for a NAS that can churn out multiple 1080p video streams to several devices at once.

So that’s the hardware side of things out of the way! I should really get a UPS for this system since I plan on storing a lot of data on it, and I will probably grab a fourth drive to get the best value out of the storage space I have. Up next I will be talking about the OS I picked to use on this NAS: RockStor!

2016 NAS: Seagate 4TB NAS Drives
Rockstor: an introduction

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