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win7 + external HDD

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4wd:
yes, it is a 2.5" external, and yes it does have usb3 ports

This is a usb 2 device, and I've been using the usb 2 ports
-Target (January 06, 2013, 10:57 PM)
--- End quote ---

Plug it into one of the USB3 ports when you get home.

USB3 ports can supply up to 900mA according to specs, USB2 only supplies 500mA.

Almost every 2.5" HDD needs over 500mA to spin up - if the over-current protection on your USB2 is a bit overzealous or the USB2 interface ICs are "crap", (as some of VIA' chips were), then the drive won't be getting the power required to spin the drive up.

By rights, the drive should have been provided with a Y cable for powering it from USB2 ports, (to provide 1000mA), but they're too stingy to do that these days.



I don't know why it wouldn't have worked going through your self-powered hub but that, naturally, introduces another unknown so best to avoid from the start - possibly the hub also current limits.

4wd:
Inquiring minds and all that....what happened?

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