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Troubleshooting

How to troubleshoot startup failure after migrating a server in UEFI boot mode to a 3rd-generation ECS instance via file-level replication?

Issue description

When a source server with UEFI boot mode is migrated to a 3rd-generation DPU instance on the VolcanoEngine platform (for example, General-purpose g3i, General-purpose g3a, or Local-SSD i3s), the destination instance cannot start properly. The system boot process stalls and displays a grub> or Shell> prompt.

Sample 1

Sample 2

Solution

Log in to the faculty VolcanoEngine instance via VNC. For detailed operations, refer to Using the console to log in to a Linux instance.

Restart the instance via the toolbar on the right side of the screen.

During the initial boot screen, immediately press and hold the esc key to access the BIOS setup utility.

Use the arrow keys to select Boot Maintenance Manager and press Enter to confirm.

In the BIOS, use the arrow keys to select Boot From File and press Enter to confirm.

On the "File Explorer" page, press Enter to confirm.

Use the arrow keys to select EFI and press Enter to confirm.

Use the arrow keys to select the operating system used by the current instance (here, Ubuntu is used as an example), and press Enter to confirm.

Use the arrow keys to select grubx64.efi and press Enter to confirm.

On the "GNU GRUB" page, press Enter to confirm.

Use your login credentials to log in to the instance.

Execute the following command to fix the issue.

/opt/efi_repair.sh

After the script execution is complete, execute the following command to restart the instance to verify whether the instance can start as expected.

reboot

Last updated: 2026.01.07 15:11:32