Restoring method for hard disk

Abstract

Disclosed is a restoring method for hard disk comprising following steps: scanning the partition and file allocation table (FAT) of hard disk and recording above information in a plurality of flag regions on end portion of hard disk wherein each flag region contains flag for indicating the accessibility of sector in hard disk and pointer association to other flag; and replacing the INT 13 of BIOS with a modified MYINT 13 to handle the reading and writing operation of data; wherein the modified MYINT 13 can find a writable location by referring to the flag region and the privilege of user and invoke the original INT 13 to execute the real reading and writing operation. By above steps, the writing operation to a location containing data can be prevented, and the data accessed by other user in a multi-user mode can also be prevented. The data in hard disk can be restored by initializing the disk with the flag region located at end portion of the hard disk in case that the system is down or the partition of FAT of hard disk has been infringed.

Dependencies are inferred from the claim text.