CentOS 6误删除的boot分区该如何还原恢复

2020-01-30 14:07:32王振洲

  [root@localhost /]# fdisk -l //查看分区

  Disk /dev/sda: 21.5 GB, 21474836480 bytes

  255 heads, 63 sectors/track, 2610 cylinders

  Units = cylinders of 16065 * 512 = 8225280 bytes

  Sector size (logical/physical): 512 bytes / 512 bytes

  I/O size (minimum/optimal): 512 bytes / 512 bytes

  Disk identifier: 0x000b1db4

  Device Boot Start End Blocks Id System

  /dev/sda1 * 1 13 102400 83 Linux//这个为/boot启动分区

  Partition 1 does not end on cylinder boundary.

  /dev/sda2 13 144 1048576 82 Linux swap / Solaris

  Partition 2 does not end on cylinder boundary.

  /dev/sda3 144 2611 19819520 83 Linux //这个为/根分区

  [root@localhost /]# mount//查看所有挂载分区

  /dev/sda3 on / type ext4 (rw)//根分区

  /dev/sda1 on /boot type ext4 (rw)//boot分区为sda1

  devpts on /dev/pts type devpts (rw)

  tmpfs on /dev/shm type tmpfs (rw)

  proc on /proc type proc (rw)

  sysfs on /sys type sysfs (rw)

  /dev/sr0 on /mnt type iso9660 (ro)

  [root@localhost /]# grub//启动grub

  Probing devices to guess BIOS drives. This may take a long time.

  GNU GRUB version 0.97 (640K lower / 3072K upper memory)

  [ Minimal BASH-like line editing is supported. For the first word, TAB

  lists possible command completions. Anywhere else TAB lists the possible

  completions of a device/filename.]

  grub》 root (hd0,0) //首先find /grub/stage1查看/boot分区为(hd0,0)

  root (hd0,0)//设置/boot分区为/dev/sda1

  Filesystem type is ext2fs, partition type 0x83

  grub》 setup (hd0)//重新安装grub

  setup (hd0)

  Checking if “/boot/grub/stage1” exists.。。 no

  Checking if “/grub/stage1” exists.。。 yes

  Checking if “/grub/stage2” exists.。。 yes

  Checking if “/grub/e2fs_stage1_5” exists.。。 yes

  Running “embed /grub/e2fs_stage1_5 (hd0)”。。。 26 sectors are embedded.

  succeeded

  Running “install /grub/stage1 (hd0) (hd0)1+26 p (hd0,0)/grub/stage2 /grub/grub.conf”。。。 succeeded

  Done.

  grub》 quit//退出 

  3.重新reboot启动系统进入grub界面测试

CentOS 6删除的boot分区如何还原

  4.查找find /grub/stage1然后找到/boot分区为(hd0,0),指定kernel,initrd, boot启动系统成功。

CentOS 6删除的boot分区如何还原