Getting this error when I try to boot system up:

error: no such device: c746ecb7-d190-48ed-b6e1-ae6366ad44ec.
Entering rescue mode...
grub rescue>

Did some research on Google and the only command I can get to work is "set" which shows this info:

cmdpath=(hd0)
prefix=(hd0)/boot/grub
root=hd0

Any help would be appreciated. I have been using Linux Mint 18.3 Sonya for over a year, so I am still new to this. I have never seen this error before. I am going to do a complete new fresh install of Linux Mint 20.3 Cinnamon in a few weeks.

Please be specific in your directions as I am a newbie to this and I am at a loss...

Thank you in advance for any and all help!!

When you format a partition the formatting program gives that partition a new UUID. When you installed grub it was set up to boot a partition with UUID = c746ecb7-d190-48ed-b6e1-ae6366ad44ec. Now grub cannot find that partition. Did you format the partition? Did you delete the partition? Do you know the addreess or UUID of the partition that you currently want to boot?

What these commands mean is that you are telling grub where the boot partition is. Richard Stallman uses a different naming system for hard drives than everybody else. So:

sda1 = (hd0,0)
sda2 = (hd0,1)
sdb1 = (hd1,0)
sdb2 = (hd1,1)
etc.

So if you know what partition /boot is in (for example sdb1) then you would enter:
cmdpath=(hd1,0)
prefix=(hd1,0)/boot/grub
root=(hd1,0)

Whether or not the commands that you found will work depends on what is the state of the partition with UUID = c746ecb7-d190-48ed-b6e1-ae6366ad44ec

Thank you for your reply Jailbait.

No, I did not.

No, I did not.

No I do not.

I am running an internal diagnostic program as we speak. So far all has checked out ok. When it is complete, I will let you know the results.

Thanks again for your help!!

A few links on how to recover from grub rescue
https://aty.sdsu.edu/bibliog/latex/d...ub2rescue.html
https://help.ubuntu.com/community/Grub2/Troubleshooting
https://christitus.com/grub-rescue/

There is also the boot repair iso
https://sourceforge.net/projects/boot-repair-cd/files/

Colorpurple21859 - thanks for the info, I will check it out!

IMHO, grub is probably not the problem - grub is merely the messenger. I would be guessing that the filesystem of the linux root is corrupt - this really needs to be fixed from a liveUSB (your install USB say) rather than from the grub shell.

Mint 18 probably doesn't have timeshift by default - what is your backup regime ?.

It isn't clear to me whether you can eventually boot Mint. If you can, do that otherwise you any Linux live CD/USB and from a terminal, run the command: sudo blkid and compare the output to the output of the UUID you posted above for the partition on which your boot files reside. They need to be the same in Grub files and /etc/fstab so check the fstab and grub.cfg files.

You haven't indicatd whether this is a single boot system with Mint or some other method so we proceed on the information we have which is a single install of Mint.

Post 2 Grub info is correct with regard to drive/partition naming for Grub Legacy which counted both drives and partitions from zero while the newer Grub2 coounts drives from zero and partitions from one.

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If the grub-recue commands don't work and you go with the boot-repair iso, it would be best to post the results before making any changes.

You can also run boot-repair from the mint iso
https://help.ubuntu.com/community/Boot-Repair