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Thread: Power External USB via Firewire?

  1. #1
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    Power External USB via Firewire?

    I remember seeing something long ago about powering a USB/Firewire external drive (I have a Seagate 300GB external) via the Firewire port and sending data via the USB port. Does anyone know about this? I've searched far and wide and come up with nothing except an overpriced enclosure that does it...
    Carputer Progress:

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  2. #2
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    Unless you already have a firewire port on your mobo, which I don't, you will need this first.

    http://www.logicsupply.com/product_i...roducts_id/185

    Then once you have that you need to get an external enclosure, something similar to this.

    http://www.meritline.com/ultra-slim-...cessories.html

    And then obviously a firewire cable to connect the two..


    EDIT: That first link is for EPIA mobos only.. so if you don't have an EPIA mobo I doubt it'll work.

  3. #3
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    Yeah, I have an EPIA M10000...

    I have a Seagate 300GB USB/Firewire external drive (as stated above), but I can't figure out how to make it power from the firewire. Will it just do it automatically? Maybe I don't have enough power so it didn't work - will have to test it on my home computer I guess.
    Carputer Progress:

    Re-do fabrication of screen [DONE]
    Add mini-USB and micro-USB power from M2-ATX [DONE]
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  4. #4
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    From my understanding and reading (which I hope I am correct) if you have the external drive it should just power from the firewire. I am assuming it is the same concept as my ipod. I hook it up to my computer through firewire and it powers the ipod and such.

  5. #5
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    Well, supposedly there is enough power for the HD via firewire, but not enough for both data and power, so it is necessary to have both USB and firewire work, but the computer would try to transfer data via firewire instead/also, which is not good. There must be some app out there that can tell the computer which interface to use. I bet the iPod uses half the power (probably less than that) than my HD (~36 watts/3 amps over 12 volts). I dunno though - I gotta do some more searching, it has to be out there on the net somewhere.
    Carputer Progress:

    Re-do fabrication of screen [DONE]
    Add mini-USB and micro-USB power from M2-ATX [DONE]
    Teardown PC [100%]
    Add HDMI > VGA converter [0%]

  6. #6
    FLAC Jahntassa's Avatar
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    A 3.5" Desktop drive will not be able to power off firewire. I'm pretty sure no way, no how. There isn't 12v in a firewire cable.

    2.5" Laptop enclosures and small CD-ROM enclosures (like for the slim drives) shouldn't have any problem, however.

  7. #7
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    Yeah, I've come to the same conclusion - thanks. I will be powering it with a hacked molex from my carputer just like I did with my touch screen. I think I'll have to upgrade to the M2 though - kinda sucks that it wasn't around when I originally bought my 90W M1
    Carputer Progress:

    Re-do fabrication of screen [DONE]
    Add mini-USB and micro-USB power from M2-ATX [DONE]
    Teardown PC [100%]
    Add HDMI > VGA converter [0%]

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