The warning doesn't explain why blocklists are a bad idea, or how putting grub in the mbr avoids using blocklists. But installing GRUB2 into the MBR is obviously a bad idea. The fact that in the install program, the only way to avoid it is to click on "Advanced" at some point, is quite scary. If you don't know that you have to do this your MBR will be trashed, as I understand it, without warning.
Reasons why putting GRUB2 into the MBR (especially as a default, with no warning, as in the installation program) (1) If you already have another boot loader into the MBR, it will be trashed. (2) If you ever install another OS which works the same way, your GRUB2 will be trashed. (3) Point (1) may be OK if GRUB2 can boot every other OS which now exists or ever will exist. I can't imagine how anyone could believe this, but, specifically, update-grub produces a grub.cfg which has found, but fails to boot, RedHat 9. This might be fixable if GRUB2 had documentation present, but (in Ununtu10.04 it doesn't), so it's not. (By contrast, I can use GRUB as installed by Fedora to chainload to an Ubuntu partition or to boot Ubuntu direct. Even so, I have Fedora's GRUB in it's own partition, because I can't trust that some other OS which I might install in future - such as Ubuntu - will trash it without warning, as would be the case if I had it in the MBR). (4) If you have suffered from (1) and (3), but your other OS was set up right, ie, it has its own bootloader in its own partition, so you want to chainload to that partition, from GRUB2, the documentation telling you how to do it seems to be missing. Certainly "info grub" seems to point to a very incomplete set of documentation, in Ubuntu 10.04. -- grub-setup: warn: Attempting to install GRUB to a partition instead of the MBR. This is a BAD idea. https://bugs.launchpad.net/bugs/445416 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
