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USB 3 hard drive not recognized

Discussion in 'Hard Drive - HDD' started by Tony D, Nov 5, 2018.

  1. Tony D

    Tony D Super-Moderator Super Moderators

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    I have a USB 3 external hard drive, 500 GB that is not recognized on USB 2 ports. I've tried it on two different computers. On both computers, the drive is recognized on the computer's USB 3 ports, but not on their USB 2 ports. One of the computers was W7 and the other was a brand new W10 machine.

    Any idea what's up with that? It should be backwards compatible.

    I will note that the ext drive has two partitions. One of the partitions may be firmware embedded in the enclosure. The embedded software is what runs the backup utility. This is the drive that I'm referring to
    https://www.amazon.com/Clickfree-Au...d=1541456118&sr=1-3&refinements=p_4:Clickfree
     
  2. Seth Anthony

    Seth Anthony Registered Members

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    Yes, it's backwards compatible.

    Is it a 3.5 or a 2.5 drive?

    I'm guessing a 2.5, and you're probably not getting enough current out of the usb 2 port to run the usb 3 drive. Does the drive have a "Y" usb cable? If so, you can use 2 usb 2 ports to get the extra current.
     
    allheart55 (Cindy E) and Tony D like this.
  3. Tony D

    Tony D Super-Moderator Super Moderators

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    Yes, it's a 2.5 and I think you hit on it with the power suggestion. On my W7 machine, the status light on the hard drive doesn't even come on. On the W10 machine, the status light comes on, but doesn't blink indicating that it's being recognized by the PC.

    The drive doesn't have one of those Y usb adapters.

    I knew USB 2 would provide 500 mA. I just checked on the web and found that USB 3 moved that spec up to 900 mA. How about that!
     
  4. Seth Anthony

    Seth Anthony Registered Members

    Joined:
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    Operating System:
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    Altaire 8800
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    Modified Texas Instruments calculator
    Memory:
    2 transistor tubes
    Hard Drive:
    pen and paper
    Graphics Card:
    TV ready
    Power Supply:
    Mouse on a wheel
    My main bench system is only usb2, so when I have to hook up a customer's usb3 drive, I have to use a Y cable.

    Ya, ya, I'm upgrading it soon:) Well, a couple of weeks ago I actually tried to update it to a usb3 by using a cheap pci to usb3 card, but she no worky.
     
  5. Tony D

    Tony D Super-Moderator Super Moderators

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    Sorry it didn't work. Maybe spend a few more dollars and try a good card.

    Anyway thanks for the heads up on the power. I wasn't aware that USB 3 devices may require more power than USB 1/2 devices. Good call.
     

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