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修复故障扇区
2022-07-28 05:28:00 【光的方向79】
目录
修复故障扇区
1、故障原因
病毒、木马等造成的破坏
不正确的分区操作、磁盘读写误操作
2、故障现象
找不到引导程序,启动中断
无法加载操作系统,开机后黑屏
3、解决思路
应提前做好备份文件
以安装光盘引导进入急救模式
从备份文件中修复
4、操作步骤
排除启动类故障
修复MBR扇区故障
1、首先创建一个文件夹。将sdb1挂载到此目录下



2.将sda磁盘中正常启动系统的信息进行备份,然后用垃圾文件覆盖到sda中,制造开机自检故障


3.开机出现故障进入急救模式Troubleshooting,然后进入Rescue a CentOS system

4、选择1)coutinue

5.然后创建一个新的目录,将sdb1挂载到此目录下,将之前备份好的开机自检信息写入sda中,随后按exit重启即可正常进入系统


GURB扇区故障
1、创建一个新目录,并将sdb1格式化并挂载上去

2.制造GRUB扇区故障

3.进入急救模式,加载光盘镜像,切换到系统根环境,重新将grub引导程序安装到第一块磁盘的mbr扇区,重新构建grub菜单配置文件,重启

忘记root密码
1.进入急救模式,chroot /mnt/sysimage然后直接passwd root

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