The cause of “grub rescue unknown file system” The reason for this error can be that you performed abnormal deletion of a partition where second/dual OS is installed. For example, this could be a PC where you were dual booting between Windows and Linux.
The cause of “grub rescue unknown file system” The reason for this error can be that you performed abnormal deletion of a partition where second/dual OS is installed. For example, this could be a PC where you were dual booting between Windows and Linux.
Updated May 2024: Stop error messages and fix your computer problem with this tool. Get it now at this linkWelcome to GRUB! Error: Filesystem Not Diagnosed Entering Recovery Mode If you get a rescue shell, it usually means that GRUB2 has crashed, so the “normal” module is being loaded. A live CD is good, but sometimes all we need is a backup case. Let’s see what tiles and wall surfaces can be accessed:
However, since Grub rescue offers a “Boot Repair” consisting of “Unknown Error File System”, it’s also possible that the root partition where GRUB is installed is corrupted. To solve this problem: This should be a possible solution, but it’s probably not necessary to use it so as not to damage the root partition.
When shopping, to find a file system that GRUB can recognize, I scan the vii tag (hd0, #) where the hashtag is a real number between 1 and 6 (note: you can omit the special “gpt” part and possibly also msdos if you are using the old partition table). Turns out gpt5 is definitely my personal partition, and gpt4 is also my Debian root partition.
In the Windows Recovery Environment, on the Select a reliable option screen, click Troubleshoot. Click “Advanced Options” and then “Automatic Repair”. After that, complete the fix, and when you see that you can actually boot your laptop.
Just set “type prefix=(hd0,msdos6)/PathToGrubFiles”, “insmod normal”, then “normal”. Again, this will be different for each computer. For example, don’t forget to type “set prefix=(hd0,msdos6)/grub2/ [enter] insmod normal [enter] normal [enter]”, optionally “set prefix=(hd1,msdos6)/boot/grub/” .
What to do in Grub when the recovery podium file is unknown?
Start by booting from Ubuntu into an ISO image.
What can you do if the PC with the Grub recovery file is unknown?
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What if the Grub-Rescue filesystem is unknown?
There is another reason for this inconvenience. In this particular case, Grub was corrupted in some way and needed to be repaired or reinstalled. However, since Grub restore fails with “Boot Repair” with “Unknown System Initiation” error, it’s also possible that the corresponding root partition where GRUB resides is corrupted. To solve this problem:
What’s the point if the grub rescue file circle is unknown?
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What to do if the application of the Grub recovery file is unknown?
Start by booting Ubuntu from an ISO image.
What does Grub offer when the recovery file system is often unknown?
Usually this problem has an alternative cause. In this particular case, GRUB got corrupted somehow and needed to be overhauled or reinstalled. However, as reported everywhere, rescuing Grub with “Boot Repair” fails with an “unknown filesystem” error, it’s actually possible that the underlying partition where GRUB is installed is corrupted. To solve this problem:
What if the Grub-Rescue filesystem is probably unknown?
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