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PSU for 20 Hard Drives

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August 14, 2009 1:32:00 PM

Hello All!

I am currently in the process of building a home server which will sport 20 SATA WD "Green" 1TB hard drives. The system will be built using a MSI mobo with a 2.2ghz Dual Core Celeron and 2-4gb of ram. There might also be 3 PCIx SATA cards as well. Video and NIC are integrated. Also, there will be fans; max 7 12v 80mm. What would be the min amount of wattage I'd need? I do have a 600w PSU, but I'm not sure if this will be sufficient.

Thank you!

More about : psu hard drives

a b ) Power supply
August 14, 2009 1:41:14 PM

Yes, it's fine. The only problem are the cables. What psu do you have?
Related resources
August 14, 2009 1:48:38 PM

Come to think of it, I also have an older Enermax 431w as well. How would that fair up?
a b ) Power supply
August 14, 2009 1:50:52 PM

An hdd should use around 5-5.4W so even Enermax should be fine.
August 14, 2009 2:25:53 PM

Excellent news! Now I don't have to buy a PSU!

Thank you very much, Hefox.
a b ) Power supply
August 14, 2009 2:46:19 PM

jromano01 said:
The PSU I have laying around is this:
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

The 12v rail amperage is OK, I wish it was a bit higher. It does have 8 4-pin molex and 4 SATA - could I buy a 1-7 molex adapter?

That PSU is best kept laying around.
a b ) Power supply
August 14, 2009 3:02:03 PM

hefox said:
An hdd should use around 5-5.4W so even Enermax should be fine.

An average HDD uses 10-15W while seeking. The 1TB Green drives are ~7.6W, and ~4W @ idle.

The main problem with a large number of HDDs is spin-up, when HDDs use the most power. According to storagereview.com the 1TB Green uses ~30W.

You should really be using HDD controllers with staggered spin-up to reduce the power draw.

I would also recommend a PSU with a lot more SATA/Molex connectors, or better yet use 10 2TB Green instead since they use less power than the 1TB (only ~14W @ spin-up per storagereview)
a b ) Power supply
August 14, 2009 3:27:37 PM

theAnimal said:
An average HDD uses 10-15W while seeking. The 1TB Green drives are ~7.6W, and ~4W @ idle.

The main problem with a large number of HDDs is spin-up, when HDDs use the most power. According to storagereview.com the 1TB Green uses ~30W.

You should really be using HDD controllers with staggered spin-up to reduce the power draw.

I would also recommend a PSU with a lot more SATA/Molex connectors, or better yet use 10 2TB Green instead since they use less power than the 1TB (only ~14W @ spin-up per storagereview)


Can you please add the links? Thank you.
a b ) Power supply
August 14, 2009 6:13:20 PM

Thanks but I can't find the power usage.
August 15, 2009 2:24:39 PM

You should probably set up staggered spin up on those drives.
August 22, 2009 12:25:56 AM

Thank you all for the info. So far, I am planning this:


Case:
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Mobo:
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

CPU:
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

RAM:
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

SATA Controller:
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
(I already have one of these)

Hard Drives:
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
(Already have 2 of these)

I will be using a Maxtor 320gb for the O/S and I have a WD Caviar Black 1Tb as well.


I was thinking of getting this PSU to power everything; I'm worried that my Apevia 600w or Enermax 431w isn't going perform well...
http://www.newegg.com/Product/Product.aspx?Item=N82E168...


Windows Home Server will the O/S - I already have a small File Server that has WHS - I am just going to create a new system.
August 22, 2009 12:26:25 AM

djcoolmasterx said:
You should probably set up staggered spin up on those drives.


How do I set that up w/ the hardware I'll be using?

Update: I checked in my controller card bios and there is nothing for staggered spin up... any suggestions?
!