恢复GPT分区的研究与实现  

Research and Implementation of Recovering GPT Partition

作　　者：陈培德[1] 吴建平[1] CHEN Pei-de;WU Jian-ping(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》2021年第7期81-86,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：GPT分区是目前硬盘普遍使用的一种分区形式,克服了MBR对分区管理不能超过2.2 TB的缺点。但是由于用户误操作、计算机病毒破坏、突然掉电等因素的影响,使得GPT分区被破坏的情况时有发生,从而导致存储在硬盘中的数据丢失。针对这一情况,该文以Windows 7为平台,WinHex15.08为分析工具,虚拟硬盘为实验对象,提出了重建GPT分区的基本思路、方法与步骤,以解决GPT分区被破坏后难以恢复的技术问题。通过保护MBR模板恢复保护MBR,通过GPT分区表模板来恢复GPT分区表及GPT分区表备份;通过GPT头模板恢复GPT头;通过GPT头备份模板恢复GPT头备份。实验结果表明:当GPT分区被破坏后,计算GPT头、GPT头备份和GPT分区表中的相关参数,通过GPT模板并修改GPT头、GPT分区表和GPT头备份中的相关参数便可成功恢复GPT分区,从而完整恢复各逻辑盘中的全部数据。GPT partition is a common partition form of hard disk at present,which overcomes the disadvantage that the MBR cannot exceed 2.2 TB for partition management.However,due to the user’s mishandled,computer virus damage,sudden power loss and so on,the GPT partition is destroyed from time to time,resulting in the loss of data stored in the hard disk.In response to this situation,taking Windows 7 as the platform,WinHex15.08 as the analysis tool,and virtual hard disk as the experimental object,we put forward the basic idea,method and steps of rebuilding GPT partition,so as to solve the technical problem that it is difficult to restore after GPT partition is damaged.Restore the MBR by protecting the MBR template,restore the GPT partition table and backup the GPT partition table by protecting the GPT partition table template.Restore the GPT header using the GPT header template.Restore the GPT header backup using the GPT header backup template.The experiment shows that when the GPT partition is destroyed,the GPT partition can be successfully restored by calculating the relevant parameters of GPT header,GPT header backup and GPT partition table,and modifying them by GPT template,so that all the data in each logical disk can be completely restored.

关 键 词：GPT分区 保护MBR GPT头 GPT分区表 GPT分区区域 CRC32校验 

分 类 号：TP311.12[自动化与计算机技术—计算机软件与理论]