General U disk failure into soft faults and hard faults, of which the most common soft failures. Soft fault mainly refers to the U disk has bad blocks, leading the U disk can be recognized by the computer, but no letter appeared, or have the letter appeared, but when prompted to open U disk to be formatted, but can not format success. There may be early signs: U disk read and write slowly, missing files still take up space. This bad U disk generally low cell repair by software, currently used low cell repair tools Mformat (you can go online to search for downloads, extremely easy to use, less than a minute to fix), and of course some of the U disk manufacturers also will provide some similar software. I believe that since it is a low grid, fault type, too, should be hard Lformat low grid tools can also be used, but because Lformat is running under dos, relatively trouble, and I also did not specifically tried, it is not recommended. Hard disk failure is mainly refers to hardware failure U, U disk plug in the computer will find new hardware, but the letter does not appear, open the U disk did not burn any circuit board or other signs of damage, and the method of application of soft failures also situation can not be resolved. (I have a long time ago, U disk, because the letter does not appear, to the service department for maintenance, because the author is also the scene, to see if they inserted a long time, did not even try to repair soft, saying it was impossible to repair, and then directly to the exchange a piece of the more than glad, also reveals the ignorance of these people.) Hard disk failures are generally U vulnerable components in the crystal due to severe vibration damage, and the reader can try to spend less than a dollar to buy a piece of the same electronic market replace the original frequency of the crystal oscillator. Broken down to show the U disk file recovery problem, U disk file recovery software fault exists only in the U disk can be identified, but was prompted to format the format of the situation can not be successful. Readers can go online to download some similar EasyRecover and other file recovery software, the author has applied several times to resolve this software U disk and hard disk file recovery. U disk (USB) data recovery include: do not normally plug lead (prompt to format, the file is missing) problems, accidentally deleted, formatted, virus damage, physically bad sectors, etc., U disk (USB) recovery rate depends on the U disk (USB) is to identify, if not recognize U disk, data recovery is very difficult, otherwise U disk (USB) data recovery success rate is high. U disk (USB) common fault types: ● insert U disk (USB) has a drive letter appears, but that point is not opened, double-click the drive letter prompt "Please insert a disk into drive" ● mistakenly formatted accidentally deleted ● ● Tip unformatted ● ● CRC error does not recognize disk data once encountered a crisis, maintain a calm state of mind is very important, otherwise it is likely to cause a rush down more damage, thus irretrievably. Before seeking U disk (USB) data recovery service providers to help, we suggest that you first try to remedy some of the routine itself. But all this must be based on a reasonable operation, otherwise the data may also cause secondary damage. U disk (USB) data recovery software: Often used in general data recovery software can perform a simple U disk (USB) data recovery work, such as: easyrecovery, fianldata, recovery4all more. How to recover u disk (USB) data: a method specific U disk (USB) data recovery can not be elaborated here, we can look for in the search engines mentioned above conventional data recovery software, referring to their specific use data recovery work. U disk (USB) fix common software download: U disk (USB) repair software used mainly: Mformat, Uformat, Usboot, the specific software downloads on the web address please find their own good, and good luck. Maintenance experience U disk (USB) data repair: Here's to all our friends are concerned it is difficult to learn a technique to everyone to do a brief introduction, a lot of friends consultative approach we want to know u disk (USB) data recovery , summed up the following way to do it in order to introduce to meet no professional data recovery equipment service personnel: a lot of people met the requirements of the customer data recovery, but they do not have a clear way, the following examples to u disk Several specific method (USB) data recovery to explain: Case A: There is a customer request to u disk data recovery capacity 256m ,, u disk access when customers bring a computer without any reflection! Because cad drawings inside works with a very important one, open the u disk (USB) is a result of one package, as long as the customer data, the shell does not have to consider apart and now master the use of anti-i5062 program as follows: (1 ) Power supply: Check the main supply voltage vcc normal (vcc = 3v power supply is the key to whether working voltage u disk) (2) Clock: The clock oscillator when measuring voltage 0.8v feet or so, the preliminary judging normal clock circuit, using substitution France to replace the crystal fault persists (the master clock signal is a necessary condition of the work) _vgtm & v (3) Communication: The measurement of the above two points, the initial judgment power and clock are normal, mainly to check the communication line is normal, check and d- the main line is normal! (4) by more than a few measurements, can initially determine the master of working conditions all have, the rest is the master problem. I believe we will achieve the purpose of replacing the main data recovery, but our many years of experience tells you that is wrong, because u disk controller chips, internal control procedures, when replacing a new master is not the flash is recognition control, we must go through at the beginning of production tools make it possible, but it would also undermine the internal flash for low-grid data stored! Based on our years of experience, mostly because of internal damage master dc-dc converter leakage to the internal power supply voltage is low to cause the master without work, the solution is as follows: the u disk (USB) of 3v regulator removed, the output at its 3v terminating an external adjustable power supply voltage is adjusted to 3v to 0.1v conducted every way to increase the voltage, when u can properly identify when the applied voltage is stopped, so you can put u disk Data read out. Because the main principle is the internal dc-dc converter leakage, so that normal vcc = 3v voltage can not meet the master work, then you can artificially adjust its supply voltage to compensate for leakage losses! When I transferred to 3.4v voltage computer can properly identify, quickly put u disk data replication within the preserve, 800 yuan at hand, simple, huh, huh, and technology are primary productive forces was right! Case II: a customer brought u disk (USB), inside a factory Annual Report, due to too many maintenance department no one dare to take this job, so the customer directly asking price 1000 yuan, the overall requirements for data recovery, u disc phenomenon can recognize disk, but when you open the message "Please format u disk (USB)"! For the second question I think we all feel very tricky, because there is no problem u can completely determine the disk hardware, mostly a software problem, but u can not format the disk, how to do it? Specific solutions: our engineers first put u disk flash removed to protect data, reload a same type flash, after access to the computer still prompts need to format, because there is no data in the new-for-flash, after formatting normal access to data, but put on flash data has also prompted the need to format, so our approach is, do not install the u flash disk into the computer, the system prompts formatted disk itself after u format seen in property the capacity of 16kb, there are flash data loading, access to the computer, the system does not prompt to format the internal data read out smoothly! Repair complete two more years of experience is the engineers, we want to help, want to learn u disk maintenance members, can solve them refer to "the ultimate u disk repair ideas and methods," wrote some time ago, the success rate up to 100%! Practice has proved that the main damage u disk and flash outspoken low! 

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