[kwlug-disc] mbr / grub2 hosed - easiest fix?

Lori Paniak ldpaniak at fourpisolutions.com
Tue Jan 26 10:46:04 EST 2010


Can you boot to ubuntu?  If not, use unetbootin and build yourself a
rescue USB.  Fix grub enough to boot Linux and then try this:

http://blogs.koolwal.net/2008/12/28/windows-xpvista-dual-boot-does-not-boot-from-grub2-or-grub-pc/

The "os-prober" package is especially clever.

Good luck!

On Tue, 2010-01-26 at 08:45 -0500, unsolicited wrote:
> I'm dual booting. Along the way I've hosed grub2 / booting / partition 
> bootloader.
> 
> Data's all there, just no boot.
> 
> Getting Win 7 to boot again, on a laptop with no cd or floppy is just 
> STUPID. All my tools, cds, diskettes, etc., fail because they don't 
> know / load usb drivers. e.g. a diskette ramdrive from a cd load works 
> fine - but doesn't have usb drivers loaded to get back to the cd it 
> came from. <sigh>
> 
> Once I'm over that, anyone run into the restore grub2 problem and 
> solved it concisely?
> 
> e.g. I can chroot /dev/sda3, and grub-install, and grub2 tries real 
> hard ... but it didn't pick up it's (old) menu when it grub-installed. 
> Or regenerate it either. (Regeneration being problematic in a 
> chroot'ed environment.) So grub starts, but it's got no menu or 
> configuration. Darned if I can't get the UUID references right, from 
> memory.
> 
> Anyone been through this / got a good web page?
> 
> Thanks.
> 
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