USB hard drive not properly identified by system

1, if the system is win98, such as can not be properly identified (even if the installation of the USB2.0 universal driver can not be recognized), this case to check your mobile hard drive is not enough power, if the power supply is insufficient will appear "cough cough" sound.

2, if your system installed is WIN2K/WINXP, the system identified to the last Device Manager also show "! Exclamation ", this situation also needs to consider whether the power supply problem, because XP by default recognizes almost all mobile devices.

3. The following approach is based on the problem of insufficient electricity supply:

1) Check if you are using a USB front interface, if it is inserted in the front of the USB port is not recognized, please replace the USB interface inserted in the chassis, because the voltage is not the same, the back of the higher voltage, the majority of the motherboard for +5v, you can meet the use of your mobile hard disk.

2 to see if you use a USB extension cord, if used, please replace, plug directly in the back of the USB socket.

3 to see if you have a USB jack after a pull up and down the switch, if you want to pull the opposite direction and your original.

4 If you have two USB connectors, one of which is plugged into a USB device and now you want to plug the USB drive, please unplug the device from the other USB port before using one of the USB ports. Make sure that when you use USB to move the hard drive, another USB port is empty.

5 The market has a kind of USB external power cord, about 10-20 pieces, one end PS/2, the other end of your mobile hard drive DC mouth, (this is +5v), so you can. (In this case, some mobile hard disk is very human, send a line such as to avoid power shortage.) ）

6) Modify the voltage of the power supply or USB in the Bois.

Attached: My actual combat

Recently, in the second-hand computer market turn when Amoy a patriot USB mobile hard Disk special 20G, Ecstasy!

Hurry home installed in my P4 love machine, faint, recognize finally unexpectedly in "Device Manager" show exclamation! What's going on? Try to do well in the second-hand business, how can ...

Think about whether it's a driver problem? My system is XP, I checked the Patriot's website (www.huaqi.com) found that only after 98 to install the driver, XP has its own drive. I still do not give up, unexpectedly will 98 under the Patriot Mobile Hard drive installed in this, but, not workable!

Is it a problem with extension cords? My machine draws two cords from behind. I will pull out the other extension, will move the hard drive directly behind the USB socket, found that, or not!

What's the deal? Do you have to use the rear 5V power supply? If used, I have no line ... Do you still get the market to match?

And then I thought, since the power supply is insufficient, whether in the BIOS can be a higher power supply, to adjust the maximum voltage to try, so I restart the computer, into the BIOS, select the power supply, and then choose the maximum voltage, after the boot is not normal, almost completely hopeless ...

I saw my two USB connectors, one of which was connected to the camera and simply unplugged the camera! After pulling the camera, I plug the line into one of the USB ports (the other, of course, becomes empty!). 3 seconds later, the system fully identified my mobile hard drive, ecstasy!

My experience: This success is mainly two steps, one step is to set the BIOS voltage, the second step is to unplug all the USB interface devices to use USB mobile hard disk.

I will sum up the experience and ideas written to share with you, I hope to help you.