Hard Drive power consumption

I have a quick questions for everyone here.

I am currently running a DC++ hub for a private community and I wanted to know how many hard drives I could run on an
Aspire 700W power supply. Just a ball park estimate based on the following items:

Intel Core 2 Duo E6600 @ 2.4GHz
4GB Kingston HyperX DDR2
Asus Radeon HD 4870
Creative Sound Blaster Fatal1ty X-Fi
Asus Optical Drive
Seagate 160GB @ 7,200 RPM
Western Digital Caviar Blue 500GB @ 7,200 RPM
3-120MM Case Fans

Also, this seems to be a bit off topic but how terrible would it be to run the system 24/7? I know the hardware longevity is shortened but what other worries do I need to be aware of?


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More about hard drive power consumption
  1. Since you haven't mentioned the hard disk drive's interface I'll provide some examples:

    WD Caviar Blue 500 GB SATA Hard Drives (WD5000AAKX)
    Interface: SATA 6 Gb/s
    Read/Write: 6.8 Watts
    Idle: 6.10 Watts

    WD Caviar Blue 500 GB SATA Hard Drives (WD5000AAKS)
    Interface: SATA 3 Gb/s
    Read/Write: 8.77 Watts
    Idle: 8.40 Watts

    WD Caviar Blue 500 GB PATA Hard Drives (WD5000AAKB)
    Interface: PATA 100 MB/s
    Read/Write: 8.77 Watts
    Idle: 8.40 Watts
  2. All of the drives are SATA 3 Gb/S. Sorry for the lack of specification.
  3. Hmmm, I have to say, I don't know what a DC++ hub is? (googled a bit but nothing too conclusive off so little info...)

    No matter, hard drives that VERY little power (like 7 to 10 watts...)


    Even if you figure 300watts for your system to run(which would a very high estimate) that leaves 400watts for hard drives, so you could connect forty (40) hard drives...

    So, can't see how power will hold you back from any practical size drive array....

    And, since 2 Tb hard drives are cheap and easy to come by, can see why you would need very many in the first place....

    There are two schools of thought on running a computer one says running 24x7 is good since on/off transients are what usually kill electronic devices....

    That said, if you run Win 7 operating system, it will spin down your un-used drives. Then, ONLY if someone tries to access one will they spin up again for use....

    BTW, how about a NAS which packages up your drives nice and neat and if things are real important you can RAID mirror them just in case of a crash...
  4. Do laptop hard drives have the same power consumption as desktop hard drives
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