I have installed Ubuntu 12.04 64bit version. I have no problem with it until we tried to take a backup by using Acronis True Image software.
Normally, Ubuntu was seen under BIOS menu under "EFI Boot" option. Then, there was a problem with this software and Ubuntu is lost from the EFI Boot menu. Then, Ubuntu cannot boot.
I have used the Boot-Repair software given in the following link.
I have followed the steps given in recommended solution. I have installed GParted, deleted the FAT32 boot partition and created an unformatted partition with bios_grub flag as recommended by the Boot-Repair software.
After completing the recommended boot repair operation, now the Ubuntu starts but gives an error as described in the title.
The disk drive /boot/efi is not ready yet or not present Error. Continue to wait or Press S to skip mounting or M for manual recovery.
If I press S, I can login Ubuntu and use it without any problem.
Also, I have checked and seen that under BIOS menu, Ubuntu still does not exist under EFI boot options. I have searched for the solution in forums and tried the recommended solutions given in the following link, but they did not work.
Please help to solve this problem, can I disable the EFI boot option from Ubuntu?