Computer USB Super strange problem

Computer USB Super strange issues VCL Component Development and Application
Http://www.delphi2007.net/DelphiVCL/html/delphi_20061222115632192.html
The USB on my computer is powered by + 5vsb. There is no problem when using a USB flash disk, but when using a mobile hard disk, the USB is directly inserted without any response. You need to shut down the computer and re-open it to identify it normally, if a mobile hard disk is removed at this time, it cannot be identified no matter how it is removed (including restart), unless it is shut down or restarted,

I thought it was a lack of power supply, but then I added an auxiliary power supply,

My system is WINXP SP2 tomato garden edition, motherboard is technology and GA-7VA-C, I doubt is not motherboard design defects? What do you think about this problem?

It is difficult to say what the problem is. One weakness of USB is that the transmission distance is short.
You can connect the mobile hard drive to the USB interface of the motherboard next to the chassis.

This problem also exists after trying.

What is the motherboard, just a brand that is not very complex, the motherboard should not have any problems in USB support.

Cancel the power saving option of the USB interface. The default value is on.

Do not use two USB ports to connect the two hard drive devices ~~!

I tried two things. They were the same as the original one,

The power option of the USB interface is also canceled.

The main board is Gigabyte

Which is the problem?

Check the USB options in the BIOS settings of the motherboard.

The connection line is wrong. Try another one with a screen.

I have also met, watching...

The USB options in BIOs are correct and there is no problem

Is there any protection software on the computer? If so, disable it.

Start/manage tools/Computer Management/disk management/Reset mobile hard disk volume label

It does not work!

Go to his website and check if there is any latest bios. update it.

Strange. Redo the system.