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Western Digital My Passport Essential 250GB USB 2.0 Portable External Hard Drive

Discussion in 'Hardware' started by Tabvla, Sep 1, 2013.

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  1. Tabvla

    Tabvla Thread Starter

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    Does anyone know how many milliamps this device draws?

    The "Technical Specification" provides plenty of info but does not specify the actual current. All it says is that it is powered directly from the USB port. But I need to know exactly what the peak ma of this device is.

    TiA

    T
     
  2. Cookiegal

    Cookiegal Administrator Malware Specialist Coordinator

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  3. DaveBurnett

    DaveBurnett Account Closed

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    650 is too much for an unpowered USB, surely?
    I thought the maximum was 500mA
     
  4. Cookiegal

    Cookiegal Administrator Malware Specialist Coordinator

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    Yes, I read that too. According to some user comments I read some sort of booster cable may be required to combine power from two USB ports. But I don't know how reliable that information is.
     
  5. DaveBurnett

    DaveBurnett Account Closed

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    Believe it. I used to sell external caddies for external 2.5 drives, and the number that people tried to return as not working was unbelievable. Yet it very clearly stated on the case that any disk drawing over 0.5 amps required the supplied mains power supply or an alternative 5 volt supply.
     
  6. Noyb

    Noyb Trusted Advisor

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    Reliable .... One of These will get you 1A capability .... Video

    Or replace the slow HDD with a SSD
     
  7. DaveBurnett

    DaveBurnett Account Closed

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    If you do use a split USB cable, try to make sure that you use USB ports on separate controllers.
     
  8. Tabvla

    Tabvla Thread Starter

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    Thanks Cookiegal, Dave and NoyB for your feedback.

    The device (which has only 1 USB port) that I want to connect the WD Passport to specifies that 500mA is the maximum for any connected drive.

    The WD Passport works as expected on my PC's and Laptops - but none of them actually tell you what the USB ports are delivering in terms of current. And as the specification for USB allows anything from 150mA to 1.5 Amps it is anyone's guess what the computers are actually capable of delivering.

    The WD Passport is a small-profile drive - about the size of a smartphone (see attached image)

    The really ANNOYING part is that one would expect to be able to go to the WD website, enter the model number and get the specs - and that the peak operating current would be one of the standard entries in the spec. Who cares if it comes in 75 different shades of yellow - or am I just being grumpy? :mad:

    Hmmmm..... I wonder if there is some way that I could stick an ammeter...... no probably not :D

    T.
     

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  9. Noyb

    Noyb Trusted Advisor

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    How many gigs do you need "Portable" for one USB port ????
    Would a USB Flash serve your application
     
  10. Tabvla

    Tabvla Thread Starter

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    Yes Jay, several Flash drives would do the job.

    But, as I have this briliant, super-fast, small-profile 250GB WD Passport sitting around doing nothing it would be very convenient (not to mention economical) if I could use the WD instead of parting with hard-earned cash for Flash drives (I don't have any spares taking up space in my draw of forgotten items).

    I am going to phone WD in the morning and have a nice little chat with Support :)

    T.
     
  11. Noyb

    Noyb Trusted Advisor

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  12. DaveBurnett

    DaveBurnett Account Closed

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    In all the years I've been working with computers, I've never seen a USB port that would reliably supply more than 500mA
     
  13. Tabvla

    Tabvla Thread Starter

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    Jay, that's the best reply that I have had in a long time..... :)

     
  14. Noyb

    Noyb Trusted Advisor

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    Maybe a few more dollars will be worth it ....
    If you have a W7 Laptop and you'd like to have a SSD in the Laptop ...
    Then you can have a bootable duplicate in your external.
    If a total Crash occurs .. Just physically swap the SSDs ... (But a Total crash is less probable with a SSD)

    This is my XP Desktop ... But if I ever put a SSD in my W7 Laptop or my W7 Desktop, I'll do the about the same for them.
    The advantage of a Build your Own .. You can physically get to the HDD/SSD
     

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