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【MBR是什么】也许MBR对大多数用户来说比较陌生。MBR的作用是非常重要的,没有了它我们甚至不能正常开启电脑。这里装机吧的小编就来给大家介绍一下什么是MBR吧。
MBR的概述:
硬盘的主引导扇区是硬盘中最为敏感的区域之一,主引导记录位于硬盘的0磁道0柱面1扇,共512bytes,由三大部分组成:
硬盘主引导记录MBR(Master Boot Record)占446bytes
分区表DPT(Disk Partition Table)占64bytes
硬盘有效标志(Magic Number)占2bytes
主引导记录(MBR)用于检测硬盘分区的正确性并确定活动分区,其内容是在硬盘分区时由分区软件(如FDISK)写入该扇区的,所以MBR不属于任何一个操作系统,不随操作系统的不同而不同,即使不同,MBR也不会夹带操作系统的性质,具有公共引导的特性。MBR的任务就是负责把引导权移交给操作系统,如果此段记录损坏将无法从硬盘引导。
因此硬盘的主引导区也成为了病毒攻击的主要对象,另外一些其他软件也会修改引导区的内容,如果修改有误也会使硬盘无法启动。主引导扇区被破坏了,开机后系统会提?quot;Disk boot failure, Insert system disk and press enter"。
那么如果引导分区损坏我们应该如何进行处理修复呢?装机吧(www.125315.com)小编给大家介绍两种方法。
方法一:如果你是Win7用户,使用u盘启动PE引导电脑,选择左下角的“修复计算机”,让他自动修复即可。
如果你是XP的用户。还是用u盘启动PE引导系统,等读取完所有的驱动程序可以用户操作后,按R选择进入修复控制台。在修复控制台下,先按照提示输入管理员密码(如果没有请留空),在接下来的c:\>后输入:FIXMBR,并回车。等系统处理完成后,重启。
方法二:1.开始,运行,输入:cmd回车。
2.打开cmd然后输入命令:diskpart回车。
3.输入:list disk这个命令会显示硬盘上所有的硬盘,请确认这个问题硬盘是第几硬盘,一般是第一硬盘吧。
4.然后输入:sel disk 1这个硬盘千万别选错了。这个是设置硬盘 1为焦点。
5.然后输入:clean 这个命令会删除硬盘1的mbr
6.成功删除后,删除成功后你的硬盘就不存分区了,接着采用diskgenius重建分区表即可修复引导了。
责任编辑:装机吧小鱼 版权所有,转载请说明出处
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