What to do if the system does not recognize a mobile drive

Mobile hard disk as the name implies that the hard disk as storage media, the exchange of large-capacity data between computers, emphasizing the portability of storage products, the system does not recognize the mobile hard disk how to do?

Under normal circumstances, when the mobile hard disk is connected to the host, the system can recognize it as a "Removable storage device" and automatically add a drive letter to "My Computer". If the system will be the mobile hard disk as "Unknown USB device", then the mobile hard disk will not be used, when this happens, you may wish to find the reason in the following order.

　　One, system-related setup installation issues

1. Do not assume that as long as the motherboard has a USB interface can use the mobile hard disk, but also to see whether the system support. Windows2000, windowsxp and above version of the system can directly support the mobile hard drive, without the need to install a driver can be used, and the use of mobile hard disk under the Windows98 must install the driver, otherwise the system will be recognized as "Unknown USB device."

2. For some Windows98 users, after installing the driver for the mobile hard drive, you can view the mobile hard disk icon from Device Manager, but there is no corresponding drive letter flag in the explorer, this is caused by improper system setup. In Device Manager, double-click the mobile Hard disk icon, and click on the "Properties" button in the pop-up window, you can see the "disconnect", "removable", "synchronous data transfer" and "INT 13 units" four options, where "can be deleted" before the system by default is not ticked, check this option to restart the computer, You can see the new removable hard drive letter in the Explorer.

　　Second, the motherboard USB interface problem

Due to a problem with the USB interface of the motherboard, the mobile hard drive does not work, mainly from the following aspects to solve:

1.USB interface is not open: on some old machines (including some brands) although there is an external USB interface, but in the BIOS is closed by default, so even if the system support is not possible, so you should check the BIOS settings in the USB interface option is turned on: When you start your computer, hold down the DEL key, Enter the BIOS settings and set onchip USB to "Enabled" in "Chipset Features Setup" or "Integrated peripherals" to save and restart your computer.

2. The system does not support USB interface: This situation is mainly on some old computers. such as a compatible machine, the motherboard is the flagship of the VISTA710V2, motherboard chipset with via Apollo MVP3, external USB interface card System is not recognized (installed Windows Me and Windows 2000 dual system), in the Device Manager can not find " Universal Serial Bus Controller ". A check on the Internet, originally motherboard chipset has a problem, hurriedly download the latest motherboard BIOS for refresh from the Internet, and download via special USB driver patch for the chipset, finally recognized the "Mobile storage Device" on my computer.

3.USB interface power supply is insufficient: most of the mobile hard disk required for the normal operation of 5V voltage, 0.5A current can be directly through the motherboard USB interface supply, but some motherboard USB interface power supply does not reach this value, resulting in the mobile hard drive can not be recognized by the system. Fortunately, the special USB cable on the mobile HDD box has a PS/2 connector, so long as the connector is plugged into the PS/2 interface of the motherboard.

　　Third, improper operation causes the mobile hard disk cannot be used

Due to improper operation of the mobile hard drive can not be used, mainly refers to plug and unplug the timing of the mobile hard disk is not well mastered.

1. It is best to close the various applications that are running before plugging in the removable drive, and do not plug in during system boot.

2. The mobile hard disk will have a system to recognize the disk, read the process, before the end of the process is best not to do anything (recommended to the mobile hard disk a few areas, the more the area, the system is more time to recognize the disk), to wait until the work of the mobile hard disk light stabilized to start operation.

3. The use of the mobile hard disk will also appear in the past can be used, and occasionally once can not be used, this situation may be "system equipment" in the "Unknown USB device" Delete, and then unplug the mobile hard disk, and then restart the system, and then the mobile hard drive connected, the fault can be resolved in general.

　　Four, the problem of the mobile hard disk itself

If the above failure reasons are excluded, the mobile hard disk still can not be used, it is likely that the mobile drive itself has a problem. The structure of the mobile hard disk is relatively simple, mainly by the hard disk box and laptop hard disk, hard disk box is generally not bad, the problem is mostly the laptop hard drive. In order to avoid the hardware damage of mobile hard disk itself, we should pay attention to the following aspects in use:

1. The mobile drive should be in a stable place and not be moved when it is reading or writing.

2. When unplugging the mobile hard drive, you should strictly follow the procedures: When the hard disk is not read, double-click the "Unplug or eject Hardware" icon in the lower-right corner of the taskbar, "Stop" the device in the window that appears, then remove the device option from the system, and then unplug the hard drive from the host (remember not to unplug Otherwise it is very easy to damage the laptop hard drive).

3. Even in the non-working state, vibration is the biggest killer of mobile hard disk, which requires users to take the mobile hard drive out of the way to adopt effective damping measures (some brands of mobile hard disk in this respect, the device itself has taken the anti-vibration measures), it is best to put it in a plastic foam around the box.

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