A few days ago I did install Ubuntu with 3 partitions, swap / and /home, then I disconnected the hard drive and I installed Windows 7 on another hard drive. The problem is: I don't get the GRUB menu to choose between operating systems.
sudo grub-install /dev/sda, but it gives me the following error:
/usr/sbin/grub-bios-setup: warning: The file system 'ext2' not allow wardrobe. /usr/sbin/grub-bios-setup: warning: Can not embed. GRUB can only be installed in this setup by using blocklists. However, blocklists are unreliable and their use is not recommended .. /usr/sbin/grub-bios-setup: error: will not proceed with blocklists.
What do I do?