2 results about "Master boot record" patented technology

The application belongs to the technical field of computer virtualization storage, and provides a method and system for detecting the integrity of a qcow2 virtual disk image file. The qcow2 file header is read, basic metadata is parsed, and the physical offset of the data cluster corresponding to the starting position of the virtual disk in the qcow2 file is automatically calculated. The data of a sector at the physical offset is read as a master boot record (MBR), and MBR parsing information is obtained. Whether the virtual disk uses a GPT partition scheme is determined according to the MBR. The GPT region is automatically located, parsed and verified, and GPT parsing information is obtained. The parsing information, check information and integrity detection information are summarized and output. The application can penetrate the mapping layer of the qcow2 format, directly locate and read the MBR or GPT region of the virtual disk, automatically complete structure parsing, CRC check and integrity judgment, and output the detection result in a clear form.

This application provides a system restore method, apparatus, and electronic device. The method includes: in a temporary operating system environment, modifying the partition information of a non-boot drive to first partition information; transferring file data from each partition of the boot drive to the corresponding partition of the non-boot drive; copying the partition boot code and partition boot flag from the master boot record (MBR) of the boot drive to the corresponding partition area of ​​the non-boot drive; modifying the partition information of the boot drive to second partition information and clearing the master boot record of the boot drive; installing a system boot manager on the non-boot drive; and swapping the identification information of the boot drive and the non-boot drive. The technical solution provided by this application can migrate the system and important data to an existing non-boot drive in an electronic device after the boot drive is damaged, realizing the role swapping of the boot drive and the non-boot drive and reducing the hardware cost of system restore.