5 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.

Systems, methods, and apparatus related to memory devices. In one approach, a memory (e.g., NAND flash memory of a solid-state drive) is allocated to a namespace for use by a host device. Master boot record (MBR) data is written by a controller of the memory to an MBR region assigned to the namespace. Read circuitry is configured to read either of user data or MBR data in response to read commands received from the host device for addresses in the namespace. The user data or the MBR data is read using a regular read operation of the controller (e.g., without triggering any hardware exceptions that require significantly slower processing by firmware of the controller).

The invention provides a cloud mirror image construction method and device, equipment, a medium and a program product, and relates to the technical field of computers.The cloud mirror image construction method comprises the steps that a mirror image disk is created, and a globally unique identifier partition table is configured for the mirror image disk; wherein the globally unique identifier partition table is compatible with a first starting mode; creating a hard disk partition compatible with a second starting mode in the global unique identifier partition table; creating a virtual machine; loading a disk mirror image file of the mirror image disk and an operating system installation source according to the virtual machine so as to install the operating system in a first startup mode; in the operating system, setting a second startup mode identifier for the hard disk partition; installing a unified boot boot program for the second boot mode to a main boot record of the mirror disk; generating a unified bootstrap program configuration file to complete the construction of a cloud mirror image; according to the method provided by the invention, the effect of improving the deployment efficiency of the cloud mirror image in the hybrid hardware environment is achieved.

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.

The invention belongs to the technical field of computer virtualization storage, and provides a method and system for detecting the integrity of a qcow2 virtual disk mirror image file, a qcow2 file header is read, basic metadata is analyzed, and the physical offset of a data cluster corresponding to the initial position of a virtual disk in a qcow2 file is automatically calculated; reading data of a sector from the physical offset as a master boot record (MBR) to obtain MBR analysis information; judging whether the virtual disk uses a GPT partition scheme or not according to the MBR; automatically positioning a GPT area, and analyzing and verifying the GPT area to obtain GPT analysis information; and summarizing and outputting the analysis information, the verification information and the integrity detection information. According to the method, a mapping layer in a qcow2 format can be penetrated, the MBR or GPT region of the virtual disk can be directly positioned and read, structural analysis, CRC (Cyclic Redundancy Check) and integrity judgment are automatically completed, and a detection result is output in a clear form.