grub rescue -> no such partition

Question

I have a big problem with my computer...

I have reduced the windows partition and when I reboot then I have the grub rescue with the error message: "no such partition".

Moreover, I don't have access to the bios and so it seems impossible to change the boot sequence to boot on my live usb or live cd.

The command line ls gives me: (hd0) (hd0,1) (hd0,2) (hd0,3)

I have a recovery windows partition (1 I think), a windows partition and a linux partition.

Yet, the command lines ls (hd0,1), ls (hd0,2) and (hd0,3) gives me the error message: "unknown filesystem" and so I can't set a boot anymore.

Do you have any idea?

Solution 1

The grub rescue> prompt signifies that GRUB 2 has failed to find the grub folder, the grub.cfg file, and/or the associated modules. The rescue prompt is presented so the user can provide the path to the grub folder, load the necessary modules, and provide the proper boot commands. A common reason for the grub rescue> prompt is an incorrect path to the grub folder. Reasons for the prompt also include a failure to update GRUB 2 after certain system or partition operations, improper designation of the grubfolder location, missing linux or initrd.img symlinks in /, or a failed installation. To successfully boot from the grub rescue> prompt:

1. The grubfolder must exist and contain the necessary GRUB 2 files and modules.
   2. The proper paths must be set via the set prefix command. Many GRUB 2 commands will not work until the correct path is set. If the path to the grubfolder (normally/boot/grub) is not correct, an unknown command or file not found message is likely.
2. The necessary modules must be loaded. The kernel cannot be loaded until the 'linux' module is loaded.
3. A Linux kernel and initrd.img must be located and loaded.

In your case the grub folder and grub.cfg is seems to be available but inaccessable because your OS's partition can't be mounted, as the corresponding module is not loaded or it is corrupted during resizing. For the module to load your grub should be completly loaded or prefix should be set. For that do the following:

1. set prefix=(hdX,Y)/boot/grub
   Use the values determined earlier. Example: If the Ubuntu system is on sda5, enter: set prefix=(hd0,5)/boot/grub
   In your case it most probabily is (hd0,3)
2. set root=(hdX,Y)
   Confirm the correct X,Y values and press ENTER. Example: If the Ubuntu system is on sda5, enter: set root=(hd0,5)
3. insmod normal
   Load thenormal module.
   If the module loads there will be no message. If the module fails to load, try the full path: insmod (hdX,Y)/boot/grub/normal.mod
4. normal Transition to the normal GRUB 2 mode with increased functionality. If the module loads there will be no message. If the module loads, HELP, TAB completion and command recall using the UP/DN keys should be available.
5. set (Optional) Review the current settings.
6. insmod linux Load the linux module. An error message usually means the path is incorrect.
7. configfile /boot/grub/grub.cfg . This should load your configuration file that allow to boot all OSs.

Solution 2

As stated elsewhere, the correct command is ls (hd0,1)/. Please try to see if that will list the contents of the file system.

To load your system manually in grub

If vmlinuz and initrd.img do not exist at (hd0,3)/, you have to specify their exact location to boot into linux. So, in grub (please adapt vmlinuz and kernel versions to your setup)>

set root=(hd0,3)
linux (hd0,3)/vmlinuz root=/dev/sda3 ro

or if (hd0,3)/vmlinuz does not exist:

linux (hd0,3)/boot/vmlinuz-2.6.32.25-generic root=/dev/sda3 ro

then

initrd (hd0,3)/boot/initrd.img 

or if (hd0,3)/initrd.img does not exist:

initrd (hd0,3)/boot/initrd.img-2.6.33-25-generic 
boot

More info can be found here.

Comments

[enedil]

Do you have Windows 8?

[Amr Ayman]

Have a look at this answer ...

[Rafed Nole]

askubuntu.com/questions/493826/…

[Rafed Nole]

askubuntu.com/questions/493826/…

[Rafed Nole]

askubuntu.com/questions/493774/grub-rescue-without-cd-error

[Rafed Nole]

Please help in the above questions as well . I am unable to locate the partition and am fed up by ubuntu.please help. see my questions above .Thanks.

[Rafed Nole]

askubuntu.com/questions/493611/…

[Sudheer]

why cant you access your bios it has nothing to do with grub

[Rafed Nole]

@Sudheer I dont know much i would greatly appreciate if you could help me fix this Thanks

[Sudheer]

can you access you bios setting

[Rafed Nole]

when i boot i get the grub rescue prompt

[Rafed Nole]

no key works just ls command works

[Sudheer]

Before grub screen when your computer logo comes you should see "esc for setup" like that

[Rafed Nole]

yes esc for start-up but pressing esc does nothing

[Sudheer]

To solve your problem you may need Ubuntu live usb/cd.

[Rafed Nole]

@Sudheer Without cd there are some ways i found I don't have any CDs

[Rafed Nole]

Could you look at the links I have commented above They describe the way I have tried

[Sudheer]

Does it say any other keys than esc. like F11

[Rafed Nole]

askubuntu.com/questions/493826/… This question gives the way I tried

[Sudheer]

@Rafad Nole where is your question link

[Elder Geek]

After you get it booted manually, Run Boot Repair to fix your Grub - Here's just one of the many sources regarding how to do this: howtogeek.com/114884/how-to-repair-grub2-when-ubuntu-wont-bo‌​ot

[Bram]

I get: Unknown command `linux'. With ls I do see that vmlinuz and initrd are on (hd0,msdos5)

[noleti]

@Bram please open a new question on that, it might be a different issue, or search for other more fitting questions here

[dev_ry]

Use the values determined earlier. in step 1, but can you please tell whats that command

[Md Narimani]

I have to do this every time I boot. How can I fix this permanently?

[Harshiv]

In my hp 15-ac026tx 'Ubuntu 18.04's case, both the vmlinuz and initrd.img were present in root, but it was "(hd0,8)/" instead of (hd0,1)/ , it shows "(hd0,msdosY) where Y is 123..89 etc number, but I did not need to type full (hd0,mados8)/ , only (hd0,8)/ worked as well the full fledged one.