Recover from Grub Rescue

[vishakraj]

Hello,

I installed zorin os in my old laptop[installed 1/2 years before, I dont know what version of zorin os installed]
after some times i did not used, then i opened, i got the grub rescue window shows error: unkown file system

I read few blogs to recover from this error

so, I tried these steps

> ls
(hd0) (hd0,msdos1) (fd0) (fd1)
>ls (hd0)
(hd0): Filesystem is unknown.
>ls (hd0,msdos1)
(hd0,msdos1): Filesystem is unknown.
>ls (fd0)
error: fd0 cannot get C/H/S values.
>ls (fd1)
error: fd1 cannot get C/H/S values.

How to solve this, Thanks

[337harvey]

It appears your hard disk is corrupt. Either the drive is failing or it was stored by a strong electrical source (creating magnetic fields).

Unfortunately the only thing you can do is boot from a live image, check the drive for errors, and fix them, and hopefully it recovers. Otherwise, reinstall and hope it's not a failing drive.

[vishakraj]

could you please share the instruction for how to check the drive for errors and how to fix them after booting the live image

[337harvey]

You can check disks supported by smart with this.