New server purchase, will I have enough power?

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Wil32

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Jul 11, 2009
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Hello guys,

I am going to get myself a BackBlaze storage pod 3.0.

With 45 drives in it, I was asking myself what kind of power supply I am going to need.
After some reserach, I found those 1200watts with the c6/c7 idle mode for 4th gen intel cpu. see Cooler-Master-Silent-Modular-RSC00-80GAD3-US
What do you guys think?

Here are the specs so far for the rest of the hardware:
Intel-i5-4570S-Quad-Core
Gigabyte-Motherboard-GA-Z87X-D3H
G-SKILL-Series-240-Pin-Desktop-F3-1600C10D-16GAO
7x HGST-Deskstar-0S03364-Frustration-Free-Packaging(4TB) (for now :))
3x SYBA SI-PEX40064 PCI-Express x1 Low Profile Ready SATA III (6.0Gb/s) Controller Card
OS Drive : either a SSD or a raid0 on the side of one of the raid6 array.

Everthing will be crypted so I need the AES-NI flag for the CPU.
For the Filesystem, i tried ext4,zfs,btrfs and i think I will go back to ext4 (currently running btrfs on another rack)
 
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HDDs usually run 8-9 watts, 45 HDDs x10 watt is 450 watts. I do not see an advantage to an I5 4570S over a regular 4570, you should be able to undervolt the 4570 if you wish, but for the wattage difference does not seem necessary.
http://www.amazon.com/Intel-i5-4570...80646I54570/dp/B00CO8TA4I/ref=cm_cr_pr_sims_t

I think you would benefit from an additional 16 GB RAM. (note Ithink Home Premium only supports 16 GB)

The Cooler Master V series is getting good reviews,
http://www.amazon.com/gp/product/B0..._m=ATVPDKIKX0DER&pf_rd_r=1WGPVQ4J176WSAVJ4PDN

http://www.amazon.com/Cooler-Master-V-Series-Modular-Certification/dp/B00CGY4ETG

Start Up specification for HGST 4TB is 12V 24 watts, 5V is 6 watts.
 
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I listed the 4570S but it was not because of the watts, I will go with the haswell i5, but I don't know which yet. 32gb ram seems overkill, it will run debian. Can you tell me why I would benefit from 32gb ram?

for the power supply i guess i will go for Corsair-Enthusiast-Series-Modular-TX850M
 
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Check out this webpage

http://www.xbitlabs.com/articles/storage/display/1tb-14hdd-roundup_21.html#sect0

It is several years old, but things haven't changed much in that particular regard. Essentially you can figure about 10 watts each under averaged load. The BIG draw for the drive is when you first start them up and the motor has to dump a lot of extra current to get the mass of the platters spinning quickly. Once the platters are moving, keeping them moving or change speed is not that big of a deal. It's the 0 to something that always take the most amount of power.

With that in mind, and that many drives, you might considered a timer plus relays setup where when you hit the power button a relay gives power to a bank of 10 drives, then 4-5 seconds later another bank, then another, then another and then finally the motherboard itself. Though you might have to do 2 power supplies in order to get the delay to the motherboard PSU (a delayed relay closes the PWR_OK "green" wire on the motherboard PSU).

You could just let the motherboard boot up initially, but put a long POST delay on it, like 30 seconds if allows. This would allow the HDD's time to spool up before any of the RAID/HBA's try to detect them.
 
th @westock2000, I will check for articles about that over the internet.

i have a norco 4020 atm with 14 drives and I don't have such delay/timer device. It boots just fine. The HBA/RAID card actually scan the bus before the OS boots to see the drives. I could also add http://rescan-scsi-bus.sh/ to my boot script(rc.local) if needed.
 
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Do you have any bookmarked article about such device (delay/timer) power switch?
 
I don't know that a "delay/timer power switch" is required. Check to see if your HBA/RAID card supports staggered spin-up.
 
Ah, thought you were still inquiring about them. :)

So I take it you haven't decided on a controller or RAID card yet, I'd suggest an LSI or LSI-rebranded controller (such as the IBM M1015) + the Intel, Chenbro or HP SAS Expanders. IIRC Backblaze uses a SATA>SATA port multiplier on their backplanes instead of SAS>SATA, so maybe this doesn't fit for you.
 
well, I don't need the RAID function actually. It is going to be a software RAID with mdadm. I have yet decide which I am going to take.
 
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