psu opinions

[ccssid]

Hello everyone,

I just built up my FreeNAS box a bit ago for plex and storing misc docs, music and videos. Everything is working great, thanks to all of you on this forum.

using 10 @ wd red x 3tb (z2 setup) and here is the rest of the story.....
https://www.newegg.com/Product/Product.aspx?Item=N82E16822236344

https://www.newegg.com/Product/Product.aspx?Item=N82E16817994080

https://www.newegg.com/Product/Product.aspx?Item=N82E16835553001

https://www.newegg.com/Product/Product.aspx?Item=N82E16813599008

https://www.amazon.com/SanDisk-Ultr...coding=UTF8&psc=1&refRID=5GJJRSE17DBTPCZ8P333

https://www.newegg.com/Product/Product.aspx?Item=N82E16819117613

https://www.newegg.com/Product/Product.aspx?Item=N82E16817151119

https://www.newegg.com/Product/Product.aspx?Item=N82E16835856005

https://www.newegg.com/Product/Product.aspx?Item=N82E16814131709

https://www.amazon.com/gp/product/B00009MDBU/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1


https://www.amazon.com/gp/product/B00H3SWJ24/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1


https://www.amazon.com/gp/product/B00YQ7D5Y6/ref=oh_aui_detailpage_o06_s00?ie=UTF8&psc=1


https://www.amazon.com/gp/product/B002RL8I7M/ref=oh_aui_detailpage_o07_s00?ie=UTF8&psc=1

https://www.amazon.com/Cable-Matter...rd_wg=kwo8r&psc=1&refRID=2B399FDX2C3C82RWX747

https://www.newegg.com/Product/Prod...escription=rosewill+blackbone&N=-1&isNodeId=1

note: the case I had laying around for several years so I decided to use it and outfit t with a couple of extra fans and the 3.5" adapters in order to fit the 10 hard drives. beleive it or not, it works out pretty good. here are my idle temps.

Code:

[root@freenas ~]# sysctl -a |grep temper
dev.cpu.7.temperature: 27.0C
dev.cpu.6.temperature: 27.0C
dev.cpu.5.temperature: 22.0C
dev.cpu.4.temperature: 22.0C
dev.cpu.3.temperature: 21.0C
dev.cpu.2.temperature: 21.0C
dev.cpu.1.temperature: 22.0C
dev.cpu.0.temperature: 23.0C
[root@freenas
color:white">[root@freenas ~]# echo "HDD temp :"
HDD temp :
[root@freenas ~]# for i in $(sysctl -n kern.disks)
> do  
>  DevTemp=`smartctl -a /dev/$i | awk '/Temperature_Celsius/{print

and

Code:

>  DevSerNum=`smartctl -a /dev/$i | awk '/Serial Number:/{print $0}' | aw
k '{print $3}'`
>  DevName=`smartctl -a /dev/$i | awk '/Device Model:/{print $0}' | awk '
{print $3}'`  
>  echo $i $DevTemp $DevSerNum $DevName
> done
da4  
da3 31C WD-WCC4N4RXK45H WDC
da2 36C WD-WCC4N0KUJ173 WDC
da1 35C WD-WCC4N5CH8P2L WDC  
da0 28C WD-WCC4N1UH2182 WDC
ada5 33C WD-WCC4N5CJ3ELS WDC
ada4 31C WD-WCC4N3DU7TXY WDC
ada3 27C WD-WCC4N4KH7YPJ WDC
ada2 28C WD-WCC4N4TZ3C85 WDC
ada1 34C WD-WCC4N3DU77SE WDC
ada0 31C WD-WCC4N4RJ8TV8 WDC
[root@freena

I have to change one more fan for the da2 and da3 drives with one more of the cougar fans.

my point is.......the "kill-a-watt" shows a max at start-up of 184 watts, and at idle 92 watts (also taking into accout a cyberpower cp1500c....which shows about 6.3 watts just by itself)

why is it , after foraging through this forum I find that everyone is of the opinion that I should have at least at 650 to 750 watt psu ??????
But when I search the net......some think a 350 watt psu is more than enough.

what am I missing here ?

btw: never have had a hickup yet in the system...albeit only been in use a couple of weeks.

thanks
sid

 

[Jailer]

Startup current draw of the hard drives. @Bidule0hm has a good post where he measured the actual startup current draw of a few hard drives for data points and it's a bit higher than you might expect.

 

[ccssid]

Startup current draw of the hard drives. @Bidule0hm has a good post where he measured the actual startup current draw of a few hard drives for data points and it's a bit higher than you might expect.

yes...that is my point. the "kill-a-watt" only shows a max of 184 watts total at startup. I found the seasonic on sale after rebate for $40.00 so i grabbed it up. originally , I was only going with 6 harddrives (eliminating the need for lsi controller card), so that is why I went for the 550. I do have a brand new corsair tx750 sitting on the shelf...not a big deal to change out, but is this really necessary

 

[Jailer]

yes...that is my point. the "kill-a-watt" only shows a max of 184 watts total at startup.

Notice the emphasis on your quote. That's the point I was trying to make. The current draw is very high and short in duration. The polling interval on kill-a-watt doesn't give an accurate measure of what takes place at start up.

There is an excellent power supply sizing guide thread that I would suggest you take a look at.

 

[ccssid]

Notice the emphasis on your quote. That's the point I was trying to make. The current draw is very high and short in duration. The polling interval on kill-a-watt doesn't give an accurate measure of what takes place at start up.

There is an excellent power supply sizing guide thread that I would suggest you take a look at.

now I see...thanks