I fixed my mbr this time by restoring the whole 512 bytes, because ubuntu installed it to the mbr on /dev/sda instead of /dev/sdf... I tried one more install with automated partitioning using "use entire disk" on a external usb disk. This time with manually selecting to install the mbr/grub in /dev/sdf instead of hd0 at the "advanced options" box on page 7 of the installer. This time the installation when fine, the internal disk is untouched and still boots fine, and the external usb disk is created fine and boots correctly.
Summary "to all my posts above" 1 Ubuntu installer behaves like a "Windows xp" installer which is in my opinion not good! 2 The "mbr" of the first disk will be overwritten if anything needs to happen to the first disk! 2a if /dev/sda will contain a already created "swapfs" partition, the ubuntu "manual partition installer" will use it if you won't deselect it! So if you don't change anything on the first disk, but only use its swapfs than "mbr" gets broken! 2b if any other filesystems are recreated/reformated on /dev/sda the "mbr" gets also broken! 2c if you are installing ubuntu to a external disk, even if you used the "use entire disk" it will break the "mbr" unless you manually select to put mbr/grub in the "advanced options" box to the right disk on the last page of the installer! 3 Ubuntu summary at page 7 of the install is missleading and wrong! The following devices etc etc will get changed/touched, if your installing to a external drive like "summary 2c" it will still screw your first drive! -- told ubiquity to install grub to sda6, but it breaks grub on mbr https://bugs.launchpad.net/bugs/409575 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
