[SOLVED] Grub Rescue - Error: Unknown File System (After installing Windows 10)

jjhhgg100123 · 07-29-2015, 03:46 PM

Today I was going to update my Windows 7 to Windows 10 (I was dual booting windows 7 and Ubuntu. Not realizing that it would overwrite grub I continued on. After leaving it for a while I came back to the...
Grub Rescue: Error
Unknown File System

EDIT: I currently cannot access Ubuntu, or Windows in any way shape or form.
I have tried booting the Live Test Ubuntu to reinstall grub although it just carries on to the same error (Doesn't boot or make any attempt. Also a warning in advance, I'm don't know much about Linux so you will need to be a bit more detailed in explanations. Although I do know quite a bit about other computer related things.

EDIT2: I'm not willing to get rid of my Windows Files, but I'm willing to get rid of Linux as for I'm not going to dual boot anymore anyways.

Emerson · 07-29-2015, 04:13 PM

You claim you know about computers.

Yet, despite Live CD is not booting you seek help on Linux forums declaring you need help with Windows.

I do not run Windows, haven't used it since 2003, so I have no clue what Windows 10 upgrade did to your computer, but there clearly is some sort of booting problem, based on information you have provided so far. Are you using BIOS or UEFI? Is your drive GPT or MBR?

I recommend you search for help on microsoft.com.

jjhhgg100123 · 07-29-2015, 04:18 PM

Quote:

Originally Posted by Emerson

You claim you know about computers.

Yet, despite Live CD is not booting you seek help on Linux forums declaring you need help with Windows.

I do not run Windows, haven't used it since 2003, so I have no clue what Windows 10 upgrade did to your computer, but there clearly is some sort of booting problem, based on information you have provided so far. Are you using BIOS or UEFI? Is your drive GPT or MBR?

I recommend you search for help on microsoft.com.

Sorry I was not clear enough, I was dual booting windows 7 and Linux and I updated to windows 10 and it broke Grub.

jjhhgg100123 · 07-29-2015, 04:46 PM

Ditching this thread because I noticed that a rude person came around.

astrogeek · 07-29-2015, 04:56 PM

Quote:

Originally Posted by jjhhgg100123

Ditching this thread because I noticed that a rude person came around.

??? I see no rudeness...

If Wx-10 nuked your boot loader AND you are not going to dual boot any more anyway... how is this a Linux related problem?

If you intend to only install Wx-10 and overwrite the Linux partition then you need to visit the Wx-10 support site.

Good luck!

rokytnji · 07-29-2015, 04:56 PM

Sigh, patience and a thicker skin go farther when asking for help.

I keep one of these isos on cd for situations like this.
It has never failed me.

http://sourceforge.net/p/boot-repair-cd/home/Home/

Code:

harry@biker:~
$ wget http://sourceforge.net/projects/boot-repair-cd/files/boot-repair-disk-32bit.iso/download
--2015-07-29 16:59:22--  http://sourceforge.net/projects/boot-repair-cd/files/boot-repair-disk-32bit.iso/download
Resolving sourceforge.net (sourceforge.net)... 216.34.181.60
Connecting to sourceforge.net (sourceforge.net)|216.34.181.60|:80... connected.
HTTP request sent, awaiting response... 302 Found
Location: http://downloads.sourceforge.net/project/boot-repair-cd/boot-repair-disk-32bit.iso?r=&ts=1438207162&use_mirror=iweb [following]
--2015-07-29 16:59:22--  http://downloads.sourceforge.net/project/boot-repair-cd/boot-repair-disk-32bit.iso?r=&ts=1438207162&use_mirror=iweb
Resolving downloads.sourceforge.net (downloads.sourceforge.net)... 216.34.181.59
Connecting to downloads.sourceforge.net (downloads.sourceforge.net)|216.34.181.59|:80... connected.
HTTP request sent, awaiting response... 302 Found
Location: http://iweb.dl.sourceforge.net/project/boot-repair-cd/boot-repair-disk-32bit.iso [following]
--2015-07-29 16:59:23--  http://iweb.dl.sourceforge.net/project/boot-repair-cd/boot-repair-disk-32bit.iso
Resolving iweb.dl.sourceforge.net (iweb.dl.sourceforge.net)... 70.38.0.134, 2607:f748:10:12::5f:2
Connecting to iweb.dl.sourceforge.net (iweb.dl.sourceforge.net)|70.38.0.134|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 627238912 (598M) [application/octet-stream]
Saving to: 'download'

download              0%[                      ]   5.40M   download           0%[          ]   5.42M   247KB/s   eta 3download         0%[      ]   5.44M   214Kdownload              0%[                      ]   5.68M  96.6KBdownload                      4%[=>                                            ]  29.40M   359KB/s   eta 37m 23s

Edu12 · 08-01-2015, 03:23 PM

[QUOTE=jjhhgg100123;5398015]Today I was going to update my Windows 7 to Windows 10 (I was dual booting windows 7 and Ubuntu. Not realizing that it would overwrite grub I continued on. After leaving it for a while I came back to the...
Grub Rescue: Error
Unknown File System

EDIT: I currently cannot access Ubuntu, or Windows in any way shape or form.
I have tried booting the Live Test Ubuntu to reinstall grub although it just carries on to the same error (Doesn't boot or make any attempt. Also a warning in advance, I'm don't know much about Linux so you will need to be a bit more detailed in explanations. Although I do know quite a bit about other computer related things.

EDIT2: I'm not willing to get rid of my Windows Files, but I'm willing to get rid of Linux as for I'm not going to dual boot anymore anyways.[

Just reinstall Ubuntu the same way you did before( same partition, size, etc) and the grub will be restored, and you will be able to continue the Windows installing process right from the point where it stoped. This worked just fine for me.

asather · 08-06-2015, 12:26 PM

I had the same problem today, from Windows 8.1 to 10 combined with dual boot with Ubuntu as base.

This fixed it for me: https://www.youtube.com/watch?v=i1QpN9IWSoc

Though I had to use msdos4 instead of msdos6 (you can see which are available for you by entering "ls")

Kind regards

jimjutte · 10-02-2015, 05:30 AM

Excellent and simple solution. I did something even more stupid than the original poster... wasn't paying attention and deleted to linux partition while "making space"... didn't think much of it... until I shut off the computer and started it up again.

To the two posters before me, it was a good simple idea, but that only works if the computer has something to work with... let's face it, to really screw up.. you need a "good" computer

Anyway, hopefully the boot repair will fix the issue. Otherwise... I'm going to need some serious fix-it time.

Cheers

Jean-Bob · 10-31-2015, 08:26 PM

After an upgrade from 7 to windows 10 while I had a Linux Mint 17.1 installation on another partition of hte same HDD I had the same kind of problems. Suddenly my Grub bootmanager was missing and it wasn't possible anymore to read or get to the partition where my Linux Mint files were installed. I searched on the internet and found out that I wasn't the first and only one who had encountered these kind of problems. The partition of Linux suddenly had become unallocated space and couldn't be read anymore. It appeared more or less deleted.
There were offered many solutions on the web but most of them were not very clear to me. One of the advices was to try a program as Testdisk which had been a solution for many so I decided to try that first.
With Testdisk installed into Windows 10

I discovered that at least the files of my Linux installation still were there. Testdisk even seemed to offer the possibility to copy those files and to paste them on an external hard drive but when I tried that I couldn't find that (connected) hard drive with the program installed on Windows, and when I tried it with a live CD with Testdisk on it I could find my external hard drive but when I pasted the files to that external hard drive nothing happened.
So I looked further for another solution. I tried Hirens Boot Disk, I tried Easus recovery but they all didn't gave me the solution for my problem. Actually most of the time nothing happened. They couldn't recover my lost files or restore the linux installation,
Then I read about another recovery tool called Free Minitool Partition Wizard and I decided to give this a chance. I had nothing to loose and I KNEW my files were still there (thanks to Testdisk)
I installed Minitool Partition Wizard on Windows 10 and ran the program. It offered me the possibility to recover the Linux partition by first marking the unallocated space where my Linux Mint installation should be and then after first a quick scan run the Partition Discovery Wizard on the left side of the window. First I had to mark ALL the unmarked boxes of the partitions it had found - also the ones with the Windows Installation on it - and at the end I only had to push on apply. Much faster than I had expected it was finished and the unalllocated space was again a partition now with EXT4 on it.
That gave me hope again. After that I used the Live Linux Boot Repair CD to reinstall the Grub which I needed to get the choice again to boot into Linux Mint whenever I wanted. To be sure I checked - after I had booted up my PC with that Boot Repair CD - if I could read the files ( and back up them at once ) and I could. I made the default repair offered by that CD and when I booted up again the Grub bootloader AND my Linux Mint installation were there again.
I hope people who encounter the same kind of problems as I did will find any help in this post of my experiences because the most solutions for this problem offered on the web untill now weren't enough to get me out of this problem because I an prpbably not geeky enough to understand. The program I mentioned has to be installed in Windows 10, but Windows 10 is the cause of all these problems so a Windows program should also offer the solution than.