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Thread: How do you know if a drive can be USB powered ?
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Old Jan 18, 2009 | 6:45 pm
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dgwright99
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Originally Posted by ScottC
General rule of thumb is that 3.5" and 5.25" devices can NOT be bus powered. That Lite-On will most certainly need a powered enclosure.

Many 2.5" HDD's can be bus powered, but some may need 2 USB ports to get enough power.

Ebay is the cheapest source for a USB powered DVD burner. Similar units on Newegg run about $65:

http://www.newegg.com/Product/Produc...82E16827151178
Originally Posted by DenverBrian
Yes. Many 2.5" HD enclosures come with a USB cable that has two male ports that Y into a single cable leading back into the male B port that goes into the enclosure itself.
Can you point me to specific examples of USB drives (or indeed any USB devices) that can draw power from 2 USB ports in order to be able to draw double the current ? I'm not chanllenging you - I just have a technical reason to be interested....
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