Jump to content


 


Register a free account to unlock additional features at BleepingComputer.com
Welcome to BleepingComputer, a free community where people like yourself come together to discuss and learn how to use their computers. Using the site is easy and fun. As a guest, you can browse and view the various discussions in the forums, but can not create a new topic or reply to an existing one unless you are logged in. Other benefits of registering an account are subscribing to topics and forums, creating a blog, and having no ads shown anywhere on the site.


Click here to Register a free account now! or read our Welcome Guide to learn how to use this site.

Photo

freenas problem


  • Please log in to reply
4 replies to this topic

#1 ghost001

ghost001

  • Members
  • 24 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:va
  • Local time:10:16 AM

Posted 18 July 2009 - 10:57 PM

im am running

JetWay JXBLUEN78V-LF AM2+/AM2

AMD Athlon X2 4450B

Kingston 2GB (2 x 1GB)

SYBA SD-SATA2-4IR PCI SATA II Controller Card

hec X-Power Pro 650

10 500gb sata

2 500 ide

im splitting the all 6 hhd power plugs so i can get the 12. all cables are connected right, the hard drive power plugs read the correct voltage and (7.6a yellow) and (1.6a red)

the problem with the system is 2 over the drives are not showing up.

BC AdBot (Login to Remove)

 


#2 fairjoeblue

fairjoeblue

  • Members
  • 1,594 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:USA
  • Local time:09:16 AM

Posted 19 July 2009 - 01:16 AM

"im splitting the all 6 hhd power plugs "

You do realize when you split power cables you are dividing the power in the lead by 2 causing each lead to only get 50% power ?

IMO, unless you have a server built to run that many hard drives you have an absurd number of HD's installed to start with !

I just took a look at the hec X-Power Pro 650
PSU.
I think you are making the classic error of looking at the "650" & thinking you have plrnty of power.

With the way the power is split up you don't have anywhere near the power on the +12V rails you probably think you do .

In order to be putting out the juice that PSU is rated at it has to be pumping 19A X 12V = 228 Watts X 4 rails = 912V .

Considering that anything over 1 rail are "virtual rails" , meaning the power is spilt from 1 output rather then javing 4 actual outputs [that would make a PSU HUGE !] you probably aren't getting anywhere near the USABLE power you expect per "rail" .

I personally think you simply don't have the power to run all those HD's by splitting the connections,


BTW, Out of curiousity, Why 12 hard drives ?
From what I can see that is 6TB of storage !!!

Edited by fairjoeblue, 19 July 2009 - 01:42 AM.

OCZ StealthXstream 700W,Gigabyte GA-EP45-UD3R , E8500, Arctic Freezer Pro 7, 3GB G.Skill PC8500,Gigabyte Radeon HD 4850 OC [1GB ], Seagate 250GB SATA II X2 in RAID 0, Samsung SATA DVD burner.

#3 ghost001

ghost001
  • Topic Starter

  • Members
  • 24 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:va
  • Local time:10:16 AM

Posted 19 July 2009 - 08:49 PM

You do realize when you split power cables you are dividing the power in the lead by 2 causing each lead to only get 50% power ?


yes i know thats what happen when you split something but the amp and volt before the split is 7.2a at 12v - 1.6a at 5v and after the split 7.6a at 12v - 1.6a at 5v.

BTW, Out of curiousity, Why 12 hard drives ?


500gb at 49.99x4= 199.96 . 2tb =229.99

found something on newegg. what do you think?

http://www.newegg.com/Product/Product.aspx...N82E16816111045

#4 fairjoeblue

fairjoeblue

  • Members
  • 1,594 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:USA
  • Local time:09:16 AM

Posted 19 July 2009 - 09:19 PM

Becuse HD's were on sale doesn't mean you have enough power supply to run them.

I know it's "to each their own" & all that but 12 HD's in a desktop computer is just absurd to me.

You need a second power supply rigged in to run some of that mess !

BTW, you are basing all of your calculations on rated power specs.
You are not taking in to account wire & connector resistance lowering the output at the HD's .

Edited by fairjoeblue, 19 July 2009 - 09:30 PM.

OCZ StealthXstream 700W,Gigabyte GA-EP45-UD3R , E8500, Arctic Freezer Pro 7, 3GB G.Skill PC8500,Gigabyte Radeon HD 4850 OC [1GB ], Seagate 250GB SATA II X2 in RAID 0, Samsung SATA DVD burner.

#5 ghost001

ghost001
  • Topic Starter

  • Members
  • 24 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:va
  • Local time:10:16 AM

Posted 19 July 2009 - 09:55 PM

BTW, you are basing all of your calculations on rated power specs.
You are not taking in to account wire & connector resistance lowering the output at the HD's .


the reading i posted are from an amp and volt meter.

using the rigs idea cant i just use an old psu and jump the green and gray??




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users