Re: [Boot-Repair] Graphical tool to repair the PC boot in 1 click!
I need to add a note of caution - boot-repair may be great, but it can cause problems!
I have a moderately complicated install situation - Vista plus 3 ubuntu installs on sda plus another 6 ubuntu installs on sdb. My Sony Vaio won't let me boot direct into anything on sdb, so I'm using PLOP to get sdb mounted from the sda GRUB2 menu. Sda is the internal hard-drive, sdb is an external USB2 2TB drive.
I installed boot-repair from the ppa, and ran it, in a 12.04 Precise install on sda. Sdb was connected but the running install was on sda. I had noticed some error messages relating to Windows programs using parts of the disk that Ubuntu expects to be reserved for grub, and also an error message when booting into an install on sdb "hd0 out of range". It appeared that boot-repair could fix both of these, so I checked the boxes and then clicked "Apply". Boot-repair got busy, and ran several modules, sending results to the url http://paste.ubuntu.com/969224/.
However, when I rebooted, the sda GRUB2 boot menu was missing, and all I got was the grub-rescue prompt. Even "ls" would not work at first, so I went through "set prefix=" and "set root=", which were echoed properly by "set". Even then, GRUB could not "see" the /boot/grub/ files, so "insmod normal" failed, and running "ls" gave a single empty line of response.
It appeared that GRUB2 was not able to recognize the internal HD.
I booted from a live-CD, and checked that the files were in fact present in the expected locations. Rather than trying a chroot from the live-CD, I installed a fresh PP install from the live-CD, to a partition with a broken ubuntu. From there I was able to boot into the original sda install and re-establish it as the "grub master".
Even then, the sdb grub menu was unavailable (i.e. left me at grub-rescue> prompt), until I did a "grub-install /dev/sdb" from the now-working sda "grub-master", and thus regained the ability to boot into an install on sdb. From there I could do "grub-install /dev/sdb" and get back to the original state of the machine.
I will not be using boot-repair again, after this experience, and I would warn others that it is apparently capable of leaving a machine in an un-bootable state under some circumstances.
Sony vaio vgn-fw235j; Synaptics touchpad; triple boot: mint 12 64-bit; Precise 64-bit & Saucy 64-bit. 2TB external USB drive with more...