U disk expansion disk and bad block explanation

Small white user on U disk there are a lot of places do not understand, especially about u disk trouble some problems. Recently small series received a Netizen's inquiry: What is a U disk bad block? Is there a u disk bad block U disk can not be used? expansion disk and U disk bad block what is the relationship? The following small series to answer.

U disk and other bad blocks, disk or hard drive bad way is actually a physical storage medium physical damage caused by the phenomenon, because the traditional mechanical disk recording mode is a rotating geomagnetic track work, and U disk is used a cell called p/n structure to store data. Therefore, the so-called "bad" "bad block" is actually a reason, is unable to save the data.

Like a piece of white paper buckle off the middle piece, so that the part of the deduction can not write the same truth.

But this is not necessarily the phenomenon of such a USB disk or hard disk can not be used, because we can use the program to screen out damaged areas, continue to use other normal areas. But that would also lead to a reduction in capacity. A lot of profiteers use this technology, acquisition of damaged U disk or hard disk, with software to block out bad blocks or bad, after using other tools to modify the parameters of the software sold to consumers, consumers can not be the first time to identify this fake and shoddy goods, the basic discovery when the merchant has moved or the problem can not find compensation.

The expansion plate is such a commodity. There is also a special expansion disk, is the U disk itself is a new small volume U disk, the use of mass production tools directly brush into large. Of course, this "big" is only a large display, the actual data can be stored unchanged. U disk work in a type called "looped" working mode, English is "spinning" meaning, when users copy large files, if the space is occupied by automatically erase the front of the space to continue to copy!

The best and easiest way to do this is to use an oversized file for a one-time copy to see if the data is complete. For example, 8GB u disk, copy 6GB of oversized movie files to see if the movie file is stored normally.

So, we do not see a U disk bad block on the fear, there is a U disk bad block we do not have to abandon U disk, can still continue to use. Before the small series also introduced how to repair U disk bad block, if you need, you can see the "Fast Repair U Disk Bad block method" this tutorial.