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When the mobile hard disk into the USB interface, at a time when, out of a "power surge on hub port" message box, saying "USB device over a power limits of its hub port." Solution to this problem are as follows:

This is a supply problem, high speed usb hub for each connection can consume up to 500 milliamps (mA) of current. If a device attempts to draw more current than this, the operation specifications will call the appropriate function to disable that specific port until the system power off and then open up (This is called "suspending" the port).

1. If the conditions to the USB Hubs plus an external power supply on the line. You can use the USB powered hub, the price is not expensive, one hundred or so.

2. Two connectors are connected to: the general mobile hard disk usb connector side has a connector on the other side there are two, plug one end into your hub, the other two full-usb plug on the computer interface, which can solve the power shortage. to move the hard disk of the two USB plugs are plugged in, mobile hard drives may be insufficient power supply! This is in fact from the keyboard port or PS / 2 口 take power (USB line comes with a PS / 2 port).

3. Short: Chassis Front USB interface, typically a short circuit (wire or interface is possible, before and after the home interface, which may have a conductive foreign matter), the front view port, disconnect from the motherboard is not optimistic about it. Or bad usb interface is inserted, the internal data lines shorted, with wire to separate the two usb like mouth, and if it is usb enclosure, then the master is not even on the line on the line

4. Do not use mobile hard disk Hub: USB front port is easy enough power (except for self-powered hub.) Try to plug the back of the USB port in the chassis. If you use USB hub to split the current drive is not enough USB device. If you move the hard drive is 2.0 words. Will affect the speed with hub.

5. Dust: all usb ports on the back, the front, and inside the pin board, including all of the joints.

1,USB 2.0 Hub for each connection can consume up to 500 milliamps (mA) of current. If a device attempts to draw more current than this, the operation specifications will call the appropriate function to disable that specific port until the system power off and then open up (This is called "suspending" the port). In addition, if the device current consumption is less than 50 milliamps, the port will not be activated;
2, there will always be this: insert a damaged hardware serial bus, it will cause the system to stop responding (hang). In most such cases, the bus reset occurs. Hot Start the computer can not solve this problem; must then turn the power off the system to reset the bus. Determine the damage to the hardware device may be more difficult;
3, check the "USB Root Hub" (USB root hub) property in the "Power" (power) tab to see the USB bus power consumption;
4, U disk to the other machines can get the normal use, such as energy, then the board's USB interface to a problem. If the U disk on another machine still can not use, the U disk damage.