That SAS/SATA controller would consume more power than all the rest of the system.

CamperBob2 5 days ago | parent | next [-]

A few watts more or less is so far down any sane list of concerns when selecting a NAS solution, I can't believe it's dominating the discussion here.

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M95D 5 days ago | parent | next [-]

It's nice to be rich and not care, isn't it...

I calculated that over the entire lifetime of my current system, the energy will cost me more than the system itself, all 10 HDDs included, and it's only 50 W or so.

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CamperBob2 5 days ago | parent [-]

The rich people I know got that way by being very selective regarding what they care about.

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M95D 5 days ago | parent [-]

You're most probably right, but this discussion started with my statement that there are no low power NAS boards.

The need for low power NAS boards is an entirely different matter. And so are advices on how to get rich.

	▲	pessimizer 5 days ago \| parent [-]
		> It's nice to be rich and not care, isn't it...

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gmueckl 5 days ago | parent | prev [-]

Depends on what electricity costs in your place. It can be anywhere from 10 ct/kWh to 45 ct/kWh and that makes a huge difference at the end of the month.

	▲	pessimizer 5 days ago \| parent [-]
		A huge difference, or between a (10W x (8,760 hours/12) x 10¢/kWh =) 73¢ and $3.29 difference per month?

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SirMaster 5 days ago | parent | prev [-]

Really?

6.1 Electrical Characteristics

The maximum power requirements for the LSI SAS 9200-8i HBA under normal operation are as follows:

 PCIe 12.0 V = 0.74 A

 Power

— Nominal = 7.92 W

— Worst Case = 13.20 W

Seems like it uses just a little more than 1 large capacity HDD.

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M95D 5 days ago | parent [-]

It's 2-3 times more than the drives. All 8 HDDs consume 4W in sleep, and they sleep more than 80% of the time (all night, all day while I'm at work, they only start 2-3 hours in the evening).

	▲	SirMaster 5 days ago \| parent [-]
		I am pretty sure the card is not using 8+ watts when all the drives on it are idle... I can't believe people are worrying about something less than 10 watts. 10 watts in constant use for a whole year is like $12 at the average electricity cost in the US. I don't even let my HDDs sleep, the constant spin up and spin down and temperature cycle associated with puts way more wear and tear on them and would cause them to fail quicker and that is way more expensive to replace. I have 20 HDDs connected to one of these SAS2 controllers in my home server.