zapped boot info

[Wes James]

On Fri, May 9, 2014 at 5:23 AM, blind Pete <0123peter at gmail.com> wrote:

> Wes James wrote:
>
> > I have a mac pro (2010?) that is set up with xubuntu 12.04.  The first
> > disk in the system has windows, the second has os X and xubuntu / and
> swap
> > partitions.  The user upgraded to maveriks, but now when the system start
> > you can see Windows, Xubuntu and OS X in the refit boot menu.  When you
> > select Xubuntu, it boots in to windows.
>
> Disappointing.
>
> > I booted from the super grub disk
> > ( http://www.supergrubdisk.org/ ) and can select the Xubuntu option and
> it
> > boots fine.  I've looked in gparted to see where the boot loader might
> > have been for xubuntu, but I can't tell.
>
> Can you tell how many partitions there are?  Look for a "fat" partition,
> on either disk.  Also, "sudo blkid" will list your partitions.
> Do you have anything under </boot/efi/> ?
>
> > There is a /boot folder so I think the
> > system was partitioned in to / and swap only.  Any suggestions on getting
> > xubuntu booting again.  I've tried update-grub2, but that doesn't help.
> >  I've looked at using the grub-install, but I'm not sure what parameters
> > I'd use to run it.  I tried:
> >
> > sudo grub-install /dev/sda
> >
> > but it says it can't do that on a GPT partition. Same with /dev/sdb.
> >
> > Thanks,
> >
> > -wes
>
> One way to get the right answer on usenet is to start by posting
> the wrong answer...
>
> Re-install from scratch, just like Windows.
>
> ;-)
>

I've been thinking about reinstalling, but what is the difference between
reinstalling and running grub-install. This version has /boot as just a
folder under / as it was set up with / and swap during intall.  I can try
it again.  It is /dev/sdb4 on the disk so should I be able to do
grub-install --boot-directory=/mnt/boot /dev/sdb4 from a live cd???

thanks,

-wes
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