Formatting principles

Note that the formatting that I have mentioned here is that we often use the actual operation to the high-level formatting, such as when you reinstall the system, addressed to a partition formatted, such as the D drive, the files stored on the original and so on did not do, except that (hard drive) address of the original pointer to point to these elements have been broken, so in fact the content is still there, but you can not see nothing, but once you write the new additional content, you The original data is overwritten, thus cease to exist. Delete a file is the same one principle (and in the recycle bin completely removed), so the content can still be used to restore the software right away format, the content has been restored, but only if the disk partition can not be in this upload other things, quick format is also can be resumed (just a simple removal FAT table (File Allocation Table), clear content).
High grid that is referred to the general format, clear the contents of the disk, initializing FAT tables, generating guide information (I have come across such a case, U disk is infected, a plug into the computer, it immediately anti-virus software to kill, then that is unable to open U disk, this time as long as the format a bit but do not select quick format, because there is above, you can use. I thought for a moment, and perhaps this is the format to re-write the information to guide the performance of the original U disk boot information has been infected with the virus as well as with the killing, due to less guidance information, it is impossible to open), and the table note bad sectors, so we know that the grid does not fix the high bar (logic) bad Road, can only mark out the (logical bad sectors), while the low-grid, said the simple point is on the disk with the head of the disk divided into tracks, divided into cylinders and sectors, re-partition, which is to undermine the hard disk, so we the user is not recommended to do, only in the hard disk the virus destroyed by magnetic fields outside the fallout of losing stored magnetic sector, resulting in a large number of the logical bad sectors when the disk unrecognizable to shield those with low lattice logic bad sectors, but now To repair logical bad sectors as long as the related software can be used, or with the re-zoning Canadian shield bad sectors like, and why to use a low grid and in return it is to reduce the cost of life the hard disk does Moreover, you are shielding the bad sectors that they were not hidden in it will be as hard to expand the use and format, and will only make the logical bad sectors more and more, they should be repaired. Also, if the physical bad sectors by the violent collisions, ah, ah magnetic surface disorder and other physical planning of injury, then no matter what format you are powerless, and only early as possible taking advantage of not scrapped quickly copy files, or holding scrap hard disk to specialized companies to recover data.