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How to fix "error: unknown filesystem. grub rescue

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lilyana
Posts: 19
Joined: 2017-11-07 15:28

How to fix "error: unknown filesystem. grub rescue

#1 Post by lilyana »

I have windows and Debian on PC, after creating a new partition in windows
I get this error: when booting Debian

Code: Select all

Error: unknown filesystem.
grub rescue>
I solved the problem according to this command:

Code: Select all

ls 
ls (hd0,msdos3)
set prefix=(hd0,msdos3)/boot/grub 
insmode normal
normal
I solved but after shutting down and start again it appears again and again!!!
if I delete the new partition, is the problem solve??
or what I can do to fix this, can you help, please?

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bw123
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Re: How to fix "error: unknown filesystem. grub rescue

#2 Post by bw123 »

If it was my problem, I would run fdisk -l and post the output on here in code tags. Then I would ask advice about how to reinstall/update grub correctly. I would not do anything until I was pretty sure that the commands i entered would work.

Until then, you can use a live system on usb or cd to access and backup your data, if you have not done this already.
resigned by AI ChatGPT

lilyana
Posts: 19
Joined: 2017-11-07 15:28

Re: How to fix "error: unknown filesystem. grub rescue

#3 Post by lilyana »

debian work fine when using this commands, but the problem is when restarting I need to do the same commands

Dai_trying
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Re: How to fix "error: unknown filesystem. grub rescue

#4 Post by Dai_trying »

After running your commands and getting Debian working you could re-install grub.

lilyana
Posts: 19
Joined: 2017-11-07 15:28

Re: How to fix "error: unknown filesystem. grub rescue

#5 Post by lilyana »

Dai_trying wrote:After running your commands and getting Debian working you could re-install grub.
How can re-install grub, can you gave me the command please?

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Re: How to fix "error: unknown filesystem. grub rescue

#6 Post by Dai_trying »

If your machine uses BIOS and your HDD is /dev/sda you can use this command

Code: Select all

grub-install /dev/sda
as root (or use sudo)

lilyana
Posts: 19
Joined: 2017-11-07 15:28

Re: How to fix "error: unknown filesystem. grub rescue

#7 Post by lilyana »

Dai_trying wrote:If your machine uses BIOS and your HDD is /dev/sda you can use this command

Code: Select all

grub-install /dev/sda
as root (or use sudo)
Thank you soooo much you solve my problem

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Re: How to fix "error: unknown filesystem. grub rescue

#8 Post by Dai_trying »

You are welcome :)

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