I can confirm that in my case sector 6 also contained the stray PRIVHEAD stuff. Zeroing this sector (only the first byte of it, in fact) in addition to zeroing the last sector fixed the problem for me. Now grub2 no longer treats the disk as LDM.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1061255 Title: GRUB recognizes defunct LDM headers To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1061255/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs