How to solve a mobile hard drive unrecognized fault

One, the system version is too low

1, the system version is too low will cause the mobile hard disk unrecognized problem, for some Windows98 users, because Windows 98 before the operating system does not support USB peripherals, so regardless of install the driver, set the CMOS parameters can not make the mobile hard drive normal use. One workaround for this situation is to upgrade the operating system to Windows 98 and recommend upgrading the system, which is now the most popular Win7 system, Win7 has many versions

2, Windows2000, Windows XP and the above version of the system can directly support the mobile hard drive, no need to install the driver can be used, and in Windows98 under the use of mobile hard disk must install the driver, otherwise the system will be mobile hard disk identification as "Unknown USB device."

Second, improper operation

1. It is best to close the various applications that are running before inserting the mobile hard disk, and do not plug in during the system startup process.

2, the use of mobile hard drive may appear this time to use, the next time occasionally can not use the situation, this situation, we can first "system device" in the "Unknown USB device" removed, and then unplug the mobile hard drive, restart the computer, and then move the hard drive to connect, the fault can generally be solved.

3, the mobile hard disk will have a system when the disk, the process of reading a disk, before the end of this process is best not to do anything (recommended that you can give a small number of mobile hard disk areas, the more areas, the system will be able to identify the length of time), and then to wait until the working light on the mobile hard drive stabilized before starting operation.

Third, the motherboard of the USB interface problem caused by

1, USB interface caused by insufficient power supply: Most of the mobile hard disk normal work required 5V voltage, 0.5A current can be directly through the motherboard USB interface supply, but some motherboard USB interface of the power supply does not reach this value, resulting in the mobile hard drive can not be recognized by the system, Fortunately, the mobile hard disk box dedicated USB cable on most of a PS/2 connector, as long as the connector plug in the motherboard PS/2 interface can be.

2, USB interface is not turned on: On some old machines, although there is an external USB interface, but in the BIOS is the default shutdown, so even if the system support is not, so you should check the BIOS settings in the USB interface option is open, check the method is: in the boot computer when the DEL key, Enter the BIOS setup interface, set "Onchip USB" to "Enabled" in "Chipset Features Setup" or "Integrated peripherals", and then press "F10" to save and restart the computer after setting.

3, may be the system does not support USB interface: In general, if it appears on the old machine, mainly in the performance of the Device Manager can not find a universal Serial Bus controller, this is because the chipset is a problem, it is possible to download the latest motherboard BIOS to refresh from the Internet, The USB-driver patch provided by via specifically for the chipset is then downloaded, so that "Removable storage devices" can be identified on the computer.

Four, the mobile hard disk itself has problems

After you have eliminated several of the above situations, moving the hard drive is still not available. Then the mobile hard disk can not be recognized may be the problem of the mobile hard disk itself, the structure of the mobile hard disk is relatively simple, hard disk box is generally not bad, the problem is mostly caused by notebook computer hard disk, in order to avoid the hard disk itself hardware damage, In the use of the following points to note:

1, the use of mobile hard disk should be placed in a smooth place, do not in it is reading and writing when the movement to be shaken;

2, in the removal of the hard drive to be strictly in accordance with the procedures: when the hard disk does not read the disk, double-click the "Unplug or eject Hardware" icon in the lower-right corner of the taskbar to "stop" the use of the device in the window that appears, remove the device option from the system, and then unplug the hard drive from the host (remember not to unplug it when the hard drive is read or write). Otherwise it is extremely easy to damage the notebook computer hard drive OH).