[SOLVED] Grub Rescue error: attempt to read or write outside of disk 'hd0' .

[akitoshi]

I installed Proxmox Backup Server on a Dell R720.
The installation itself was successful, but after rebooting, it entered Grub rescue mode.

I used Super Grub2 Disk to boot from the ISO. After booting, I ran 'update-grub' and then 'grub-install /dev/sda'.

However, after rebooting, it still went into Grub rescue mode.
As a test, I installed regular Proxmox, and it booted normally.
I have no idea why the Backup Server won't boot properly.
Help me!!

 

[Stoiko Ivanov]

see: https://forum.proxmox.com/threads/s...-to-read-or-write-outside-of-disk-hd0.116320/
I think this should match your issue

 

[akitoshi]

Thank you for your response.
After checking, I found it was set to Legacy BIOS. When I switched it to UEFI, it started working.
Thanks a lot!