MBR磁盘转换为GPT磁盘的研究与实现  

Research and Implementation of MBR Disk Conversion to GPT Disk

作　　者：陈培德[1] 吴建平[1] 刘宏杰 白雪松 景文超 CHEN Pei-de;WU Jian-ping;LIU Hong-jie;BAI Xue-song;JING Wen-chao(School of Information Science and Engineering,Yunnan University,Kunming 650223,China)

机构地区：[1]云南大学信息学院,云南昆明650223

出　　处：《计算机技术与发展》2022年第7期99-104,共6页Computer Technology and Development

基　　金：国家自然科学基金地区项目(61662087,61462093);云南大学校级项目(C176240501007)。

摘　　要：MBR磁盘是硬盘一种分区格式,最大支持2.2 TB的硬盘;而GPT磁盘是硬盘的另一种分区格式,克服了MBR对分区管理不能超过2.2 TB的缺点,是目前硬盘普遍使用的一种分区形式。该文以Windows 10为平台,WinHex 15.08为分析工具,虚拟硬盘为实验对象,制作GPT头、GPT分区表、GPT头备份模板,通过GPT分区表模板来恢复GPT分区表及GPT分区表备份,并重新计算GPT头中的GPT分区表CRC32校验和、GPT头CRC32校验和。实验结果表明:MBR磁盘转换为GPT磁盘,通过扫描丢失的分区获得各分区的开始扇区号和容量,通过容量计算出总扇区数,通过开始扇区号和总扇区数计算分区结束扇区号,通过GPT分区表模板成功恢复GPT分区。该文提出了将MBR磁盘转换为GPT磁盘的基本思路、方法与步骤,解决了将MBR磁盘转换为GPT磁后,GPT分区难以恢复的技术问题。MBR disk is a partitioning format for hard disks,supporting a maximum of 2.2 TB hard disk.GPT disk is another partitioning format for hard disks.It overcomes the disadvantage of MBR that partition management cannot exceed 2.2 TB,and it is a partition format commonly used in hard disks.We use Windows 10 as the platform,WinHex 15.08 as the analysis tool,and virtual hard disk as the experimental object to make GPT header,GPT partition table and GPT header backup template,and restore GPT partition table and GPT partition table backup using the GPT partition table template and recalculate the GPT partition table CRC32 checksum in the GPT header and the GPT header CRC32 checksum.The experimental results show that when the MBR disk is converted to GPT disk,the starting sector number and capacity of each partition are obtained by scanning the missing partition.The total number of sectors is calculated by capacity.The end sector number of the partition is calculated by the start sector number and the total sector number.The GPT partition is successfully restored with the GPT partition table template.We present the basic ideas,methods and steps of converting MBR disk to GPT disk to solve the technical problem that GPT partition is difficult to recover after MBR disk is converted to GPT magnetic.

关 键 词：MBR磁盘 GPT磁盘 保护的MBR GPT头 GPT分区表 

分 类 号：TP311.12[自动化与计算机技术—计算机软件与理论]