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    7200 rpm drive: bus powered?

    Discussion in 'Hardware Components and Aftermarket Upgrades' started by TedDemen, Sep 25, 2007.

  1. TedDemen

    TedDemen Notebook Guru

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    just curious if i can run a 7200 rpm external usb2.0 drive bus powered? (as in no external power supply)
     
    TedDemen, Sep 25, 2007
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  2. ZaZ

    ZaZ Super Model Super Moderator

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    Yes you can.
     
    ZaZ, Sep 25, 2007
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  3. R4000

    R4000 Notebook Virtuoso

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    Yes it can, but it may require dual USB port use under load (as opposed to running the external entirely on one port). ie; data/power+power
     
    R4000, Sep 25, 2007
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  4. TedDemen

    TedDemen Notebook Guru

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    interesting.
    how can i know for sure? is it at all drive-model dependant? or maybe laptop dependant?
     
    TedDemen, Sep 25, 2007
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  5. R4000

    R4000 Notebook Virtuoso

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    Both, as not all 7200 drives and USB controllers are created equal. If the drive shuts down or causes a disc error under load, then it is likely not receiving enough power from the data USB line.
     
    R4000, Sep 25, 2007
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