grub2 on my embedded Board Corrupted, entered into grub rescue mode

Question

I am working on a Intel board with centos running on it. My grub2 got corrupted. and entering into grub rescue mode

Problem - whenever I reboot the device. grub rescue contains below info, when I do ls

grub rescue> ls
(hd0) (hd0,msdos3) (hd0,msdos2) (hd0,msdos1)

 grub rescue> ls (hd0,msdos1)/
 ./ ../ grub/ grub2/ .vmlinuz-3.10.0-123.el7.x86_64.hmac System.map-3.10.0-123.el
 7.x86_64 config-3.10.0-123.el7.x86_64 symvers-3.10.0-123.el7.x86_64.gz vmlinuz-3
 .10.0-123.el7.x86_64 initramfs-0-rescue-7045993b43374642b45420e6c103adc8.img vml
 inuz-0-rescue-7045993b43374642b45420e6c103adc8 initrd-plymouth.img initramfs-3.1
 0.0-123.el7.x86_64.img initramfs-3.10.0-123.el7.x86_64kdump.img


grub rescue> ls (hd0,msdos3)/
./ ../ boot/ dev/ proc/ run/ sys/ etc/ root/ tmp/ var/ usr/ bin sbin lib lib64 
home/ media/ mnt/ opt/ srv/ .autorelabel .readahead

How can I solve this issue. Thanks in advance

Answer 1

command line Interface:

set boot=(hd0, msdos1) set prefix=(hd0, msdos1)/boot/grub insmod normal

normal

instruction: give command ls It will show your partitions like (hd0) (hd0,msdos3) (hd0,msdos2) (hd0,msdos1) then type ls and your partitions one by one Example: ls (hd0,msdos3) If it says, Its not your file system, that means, that is not your linux partition. Search one by one. You linux partition will show you a file system like ext2 Use the partition name like (hd0,your linus partition) in command.

Answer 2

I faced the same problem. The solution is simple. Type in either of the following:

1. exit

 OR

2. Exit

I do not remember the exact one, but what happened next was that either it went to UEFI, where I changed the boot order and delete it after entering Windows, or I was given the option to choose which disk to boot from, where I choose the partition with Windows.

No installation or recovery of Windows was required.