Using Ghost to repair unformatted U disk

My U disk is SIMPTECH brand, 256 megabytes. In the process of repeatedly trying to make a U disk boot disk, the U disk is inexplicably broken, originally in Dos. The U disk can already boot the DOS system, but it can't be started later.

I entered the Windows XP system, I can see the drive letter of the U disk in "My Computer", click the left button, the prompt is not formatted, I right click and select "Format", regardless of the quick format , or regular formatting, are prompted "can not be formatted". Because the U disk is bad in the process of making the boot disk, I believe it is not physical damage, it should be repaired.

I downloaded a repair tool such as mformat V1.0 to repair the U disk. I tried it many times and it didn't work. I used the boot disk to load the U disk, I want to use the disk repair tool under fdisk or DOS under DOS, but I don't recognize the U disk under dos, I almost gave up.

An accidental opportunity, when I cloned the system, when I chose the cloned source file, I saw two disks, the first one is my hard disk, and the second one is my USB disk. Suddenly thought of an article on the Internet that used Ghost to repair the hard disk. I am trying to make a small ghost file and restore it to a USB flash drive. Under Windows, move my D: partition file to another partition, format D: partition in Fat32 format; restart the system to dos, run ghost, local→partition→to image to make a D: image file. I named d.GHO because the D: disk has no files and the image file is done in an instant. I will return to the ghost startup interface, local→partition→from image, select the image file d.GHO as the source file, and restore it to the U disk (at this time, look at it, don't restore it to your hard disk.) On that partition, otherwise, all the files in your partition will be lost), and you will finish it in an instant.

The project management department restarted the system to the windows system, clicked the drive letter of the U disk, and opened it smoothly; tried formatting, everything went smoothly, the space size was still 256 megabytes; try copying the files of other disks To the U disk, success.