Grub rescue no such partition while updating to Win10

Question

So, i wanted to update my Win7 partition to Win10. Besides Win7 I have installed a Ubuntu 14.04 and a Dualboot with Grub. So while updating to Win10 there was a restart and I ended up in the grub rescue console telling me:

error: no such partition.
Entering rescue mode...
grub rescue >

I can't boot to any of the installed operating systems. When I type ls it tells me my partitions:

(hd0), (hd0, msdos5), (hd0, msdos3),(hd0, msdos2), (hd0, msdos1)

But the boot partition is (hd0, msdos6) which is not listed here.

What can I do the repair the Grub loader to finish Win10 installation AND rescue my Ubuntu?

Was Windows 7 UEFI or BIOS? Post this from live installer's terminal: sudo parted -l — oldfred, Feb 06 '16 at 19:44
I think it was BIOS, have to get a Live CD first... Haven't thought about such issues — Obl Tobl, Feb 06 '16 at 19:52
If BIOS, Windows may have forgotten to write your Linux partition back into partition table. It is still there, just needs to be in partition table. Old Windows bug going back many versions on any major update in Windows. http://askubuntu.com/questions/654386/windows-10-upgrade-lead-into-grub-rescue/655080#655080 — oldfred, Feb 06 '16 at 21:34

score 0 · Answer 1 · answered Feb 06 '16 at 17:47

0

From your windows 10

Run a cmd as adminstrator and type:

bcdedit /set {bootmgr} path \EFI\ubuntu\grubx64.efi

Reboot

answered Feb 06 '16 at 17:47

GAD3R

3,507

I can't boot to any of the installed operating systems, that includes also Win10. – Obl Tobl Feb 06 '16 at 17:49
Use a Windows install CD (Win7 works, too) to run this command. Or use a Linux Live CD and boot repair. – Peter Nerlich Feb 06 '16 at 17:59
Ok, i will try it! – Obl Tobl Feb 06 '16 at 18:01
Unfortunately that does not work... – Obl Tobl Feb 07 '16 at 09:50
boot from cd win10 , when you see install Now hit ( shift + f10) to open cmd, type fixmbr \device\harddisk0 then type O and reboot – GAD3R Feb 07 '16 at 10:14
@GAD3R will this fix my dual boot or just enable to boot to Windows? – Obl Tobl Feb 07 '16 at 11:52
first time to boot from windows and next time to fix dual boot using bcdedit /set {bootmgr} path \EFI\ubuntu\grubx64.efi – GAD3R Feb 07 '16 at 12:01
I tried the command and all other variations of this, but still no grub at boot... – Obl Tobl Feb 12 '16 at 10:57

Grub rescue no such partition while updating to Win10

1 Answers1