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  1. #1
    Senior Member Good Companion's Avatar
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    Bad drive or enclosure?

    I picked up a used 200GB IDE drive from my in-laws neighbor. It came out of a computer but I don't know whether it was working fine or in trouble. I threw it into an IDE enclosure I have and the disk did not spin up. When the disk is connected to the enclosure, everything appears dead (no lights, no spin up, etc.). If I remove the drive from the enclosure and plug it in, the lights come on. I tested the power connector inside the enclosure and it seemed to be putting out 4.7 watts. I'm a novice with a multimeter so I'm not totally sure of my readings.

    I figure that I can always open up a working computer in the house and connect the hard drive to a power connector to see if it spins up. Anyone have any other ideas how I can discern which is faulty?

    TIA ...
    " ... and you'll need a good companion for the ride ..."
    Bruce Springsteen, Land of Hope and Dreams

  2. #2
    Millwright stroyal's Avatar
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    That is the only way I can think of.
    I've had an enclosures fail, and the drive is still, operating in my wifes computer.

    I'm curious, how you arrived at 4.7 watts.

    Is this one of those fancy meters, that reads amps.
    You should be seeing 12volts, and possibly 5volts, on another line.

    I have never checked, but USB puts out 5volts, so the enclosure must boost it up to 12volts.

    If it is a full size IDE drive AFAIK, there is not enough power to run a full size drive in an enclosure, off the USB 5volt bus.
    There are a few, but I think, they all use 2 USB lines, for the extra power.

    Most, full size drive enclosures, need there own 5v power supply.
    Is there a plug, for a power supply, on the enclosure.
    Hard Sayin Not Knowin

  3. #3
    Senior Member Good Companion's Avatar
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    Reading your post, I realized that I didn't describe the enclosure anywhere near detailed enough. Sorry for that. The enclosure has a separate AC power cord that goes into an outlet. There's a box along that line, similar to a laptop power cord, so I imagine that's where the voltage is reduced. It uses USB to transfer data.

    It is a 3.5" (full sized) IDE drive.

    The multimeter is not fancy, so the more I think about it, I was probably reading 4.7 volts (not watts). That was reading from the red and one black wire at the HD power connector. I took that reading from the DC side, so I hope that was right.

    Does that help?
    Last edited by Good Companion; February 25th, 2012 at 02:08 PM. Reason: Add info
    " ... and you'll need a good companion for the ride ..."
    Bruce Springsteen, Land of Hope and Dreams

  4. #4
    Millwright stroyal's Avatar
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    It sounds liked you are doing everything right. Yes DC.
    I'd give it a try in a computer.

    The red wire is probably 5 volts, like in a computer. So 4.7, makes sense.
    There is a yellow one that is 12volt.
    Do you have yellow one.
    AFAIK, full size hard drive runs on 12v.

    Watts, are an expression of volts, and amps.
    V X A = W

    A 100 watt device draws 100 watts no matter what the voltage is.
    As volts go up, amps go down, and the watts remain the same.


    In order to get watts, you need an amp meter that wraps around, the individual wires, and measures through induction.

    Then, you have to calculate the watts.
    Hard Sayin Not Knowin

  5. #5
    Ride 'em Cowboy Steve R Jones's Avatar
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    Make sure the jumper pin on the drive is set to Master. If that doesn't help try Cable Select.
    "If you can keep your head and remain calm when all those about you are panicking...perhaps you don't fully understand the situation!"

  6. #6
    Senior Member Good Companion's Avatar
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    To follow up, it must have been the enclosure. When I put it in a computer, it spun right up.
    " ... and you'll need a good companion for the ride ..."
    Bruce Springsteen, Land of Hope and Dreams

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