Executive summary: The customer brought a 32M USB flash drive, indicating that it was not formatted,

Turning to 32 sectors, the contents are filled with FFFF, as shown beneath:

Continue to turn down and discover that several of your following sectors would be the identical as 32 sectors, all filled with FFFF. Looking eb5890 using the search function of WinHexr, it was not located, indicating that DBR has been destroyed. Next, see in the event the FAT table is damaged. Make data recovery software free download of the search function of WinHex to search for F8ff. Consequently, a FAT table was located in the 96 sector. Continue to look down. If it's not found once more, it can be a FAT table.

Calculate here, diskgetor data recovery free download -33 = 63, then use 96 + 63 = 159, where 63 is the quantity of sectors, which implies the amount of sectors involving the FAT1 table as well as the FAT2 table at the starting of your DBR, that is the FAT table Size (just guess now), visit sector 159, see the data in sector 159, the initial 158 ​​sectors are all 0, indicating that from 159 sector is FDT, then turn down 32 sectors, visit 191 fan Area, there is a root directory, so far, the structure of this U disk has been clear:

MBR0 sector

DBR32 sector

FAT133 sector starts, size 63 sectors, FAT296 sector begins,

FDT159 sector starts, the information location starts from 191 sectors.

Then format the U disk and create the DBR from the U disk for the 32 sectors in the mirror,

Right here we require to modify the parameters with the next DBR. Based on what we calculated earlier, the FAT1 table starts from 33 sectors, the Fat2 table starts from 96 sectors, and the DBR is at 32 sectors. In line with the lazy man of Qingyuan, adjust the Fat table , Modify the quantity and size with the FAT table, and reserve the amount of sectors, right here set to 1, 63, 64, respectively (the original is 2, 248, 8 is usually compared with all the following two figures, there is an asterisk in front of it indicates that it really is modified ) Then save and reopen it. The strange point just isn't ideal. Following careful calculation, it ought to be proper. It should not be performed a handful of times. Later, I suddenly thought that there is a difficulty using the cluster size. data recovery software free download formatted cluster size is 01. I calculated it according to the formula. The total variety of clusters is 63 * 512 / 2-2 = 16126, and the information region size is 64000-2 * 63-32. -32-1 = 63809, the cluster size is 63809-16126 = three.95, we take 4, modify the cluster size, save then open, the data is completely restored.