Hi to all,

 

I'm interested to know who uses a server grade redundant power supply for unraid, and what the power consumption in power off mode is.

 

I've used a EMACS R2W6500P (500W) and noticed that the power drawn by the supply itself (when the server is powered down) still equals to 60W of power drawn from my power outlet, which I think is an awfull lot.

Ok I know these are actual two power supply's (redundant), so I've measured the power drawn when only one outlet is connected and indeed a 30W power draw remains.

 

My average ATX power supply consumes only 11W in power off mode.

 

So my question is who uses a redundant power supply, and which models are let's say a bit more "green" than mine.

 

Thanks in advance for your reply's.

Nobody that knows how much his power supply draws from the outlet ?

Nobody that uses redundant power supply's either ?

 

Numbers on standard ATX power suplly's are welcome too.

 

hardly anyone uses server grade redundant power at home

not sure what my box idles at when off as i never turn it off when on im around 100watts with esxi 90%load

Even 11W is on the high side but possible for some ATX supplies. I have a very efficient PS that measure 1-2W when in standby and nothing when off. I measured another one and it was 7W when off.

 

30W isn't great but manufacturers of server grade parts likely don't care much about the off power consumption. What's the running power consumption like?

Some of us do use redundant power supplies at home. All of my servers are "enterprise grade" with redundant power supplies, each plugged into a separate UPS that is plugged into separate circuits.  Unfortunately, the redundant power stops at my electrical panel.

 

Anyhow, here are the stats I pulled on my unRAID box (with three power supplies) a while back.  I have more drives now, so the numbers are probably a little higher.  As you see, there isnt really much difference in what one PS pulls and what three pulls.  The second and third are basically in "standby" most of the time.

 

State                            One PS (watts)  Three PS (watts)

  Standby                                5                15

  Initial Powerup                      230              250

  During Boot                          130              150

  Fans on LOW - All Drives Spinning    104              136

  Fans on LOW - No Drives Spinning      65                96

  Fans on HIGH - All Drives Spinning    112              143

  Fans on HIGH - No Drives Spinning      73              105

  Parity Check                          132              162

Lionelhutz :  A power usage off 0 watts when powered off seems a bit low, since the mobo draws some power from the PS and so do the internal components of the PS (though minimal).

 

StevenD: Interesting results you have for your redundant supply, which is much lower than mine. I'm beginning to think that mine is flawed.

Power consumption in idle is about the same on my system. So it's my PS that draws almost halve of the power consumption in idle.

Which brand and model of PS do you use ?

I've noticed that you have a supermicro and areca controller like I do, though my areca controller doesn't work well in unraid (all drive info turns up as garbage), did you set it up as raid or jbod ?

 

 

 

Need to define what is meant by Off and Standby.

 

Off can mean PSU possibly not connected to anything and with its local mains switch (if it has one) in the Off position.  Most such supplies would take zero power when switched off whether connected to a load or not.

 

The Standby case can be the power supply on its own or when connected to a motherboard.  On its own is better for comparison since it ignores power taken by chipsets, USB accessories, etc.  In that case one should see power consumption below one watt in many cases.  (However, many simple power meters are not that accurate below 10 watts or so.)  The standby mode power consumption with the PSU connected to a bunch of hardware is useful but only if all of the hardware is known and in a known state.

 

I would think that server grade redundant supplies may have significantly higher idle or standby mode power consumptions since they perhaps have to be ready to deliver full power pretty much instantaneously.  They also presumably have a greater degree of self monitoring which also takes power, even if only a very little.

Which brand and model of PS do you use ?

I've noticed that you have a supermicro and areca controller like I do, though my areca controller doesn't work well in unraid (all drive info turns up as garbage), did you set it up as raid or jbod ?

 

 

I have whatever "760W Triple-Redundant Power Supply" came with the SuperMicro case.  Im pretty sure its proprietary.

 

I have the Areca set up using RAID.  I have two 4TB drives and currently I have a 4TB RAID 0 for Parity and a 1TB RAID 1 for Cache.  Looks like I need to update my signature and My Rig.