We're upgrading several systems from Debian Lenny to Squeeze and I'd like to ensure that I haven't missed any grub2 installations. By default, Squeeze chain-boot-loads from grub1 and you have to run
upgrade-from-grub-legacy to upgrade. So I'd like to be able to remotely check to see if grub2 has been installed in the disk boot sector without rebooting, and without overwriting the boot sector.
Is there anything easier than doing a hexdump of the early blocks of the hard drive and trying to identify grub2-specific bytes?