under powered usb port

[subphonix]

I've bought a WD passport hard drive and it needs 1000ma power; my usb ports only give out 500ma. Can anyone advise me on how to get it to work? Thank you :happy:

 

[Alvin.C]

Hello,

You need to use a 5V DC adaptor to power it if your USB ports doesn't give enough power.

 

[philbar71]

i'm not shure about usb ports but is it a 2.0 and is your power supply have enogh of power for it

 

[subphonix]

yes the usb ports are usb 2.0 problem is the hard drive has no power input - the only power it gets is from the usb. it works on some other computers

 

[philbar71]

got a higher wattage power supply

 

[IfYouHaveToAsk]

got a higher wattage power supply

no this is nothing to do with the power supply.

All usb ports provide 100mA of power as standard, but can go to a maximum of 500mA.

"The USB specification provides a 5 V (volts) supply on a single wire from which connected USB devices may draw power... Initially, a device is only allowed to draw 100 mA. It may request more current from the upstream device in units of 100 mA up to a maximum of 500 mA."

1) Go to control panel > system > device manager and find the usb root hubs and check there are no options to play with.

2) Also check that you can't connect 2 usb cables to the hard disk.

3) Failing that then check the WD site.