Ubuntu :: Grub Error :unknown Filesystem?

Feb 25, 2010

i have changed from windows xp to ubuntu 9.10 in monday but yesterday i turned my pc on and when i get in my session all get freeze, i waited for an hour and it was the same so i turned it off pressing the on/off button of the cpu, when i restarted it it saysGrub loading...Grub failed: unknown filesystemGrub rescuei dont knoe what to do.PD:i removed windows, only ubuntu is in the PC

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Ubuntu Installation :: Grub Error: Unknown Filesystem And Grub Error: No Such Disc

Nov 23, 2010

I have a dual boot system with ubuntu 9.10 x64 and Windows 7. Everything has been working fine for a a long time but yesterday I tried to delete an unused partition through the Disk Utility in ubuntu (System->Adminstration->Disk Utility) and everything was messed up. I used to get the "Grub error: Unknown filesystem". I managed to create an ubuntu bootable usb and followed some tutorials for fixing grub but all i managed to do is to get another error: "Grub error: No such disc". After some experimentation i got
"Grub stage 1.5" which gave me a grub> command prompt./dev/sda is the drive containing Windows and Ubuntu.

Code:

[ Boot Info Script 0.55 dated February 15th, 2010
============================= Boot Info Summary: ==============================
=> Grub 0.97 is installed in the MBR of /dev/sda and looks on the same drive
in partition #6 for /boot/grub/stage2 and /boot/grub/menu.lst.

[code].....

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Ubuntu :: 9.10 - Grub Loading / Unknown Filesystem Error

Jan 3, 2010

I had win7 on my laptop. Before sometime I install Ubuntu 9.10 and it worked fine. Bur later that I resize the partition using third party software. Now when I restart the system it is giving me an error
GRUB Loading
error: unknown filesystem
grub rescue>
I am not able to access the harddrive. I am very new to ubuntu.

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Ubuntu :: Grub Rescue - Error - Unknown Filesystem

Feb 7, 2010

I have been using ubuntu 9.10 for a month. i have it installed on a 5GB separate partition of a 80 GB hard disk with my XP installed on a C drive(a separate partition ofcourse) then i had to remove it from my PC so i boot my PC with a partition manager cd and directly formatted that partition of 5GB from that software now i am having this error on my boot of PC....

grub rescue> error:unknown filesystem

I have tried a lot of commands here on this screen and nothing happens...i want to go to my XP .... and can't loose my XP OS and other data as well on different partitions.....

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Ubuntu :: Error: Unknown Filesystem Grub Rescue

Oct 16, 2010

there was ubuntu on my pc operating system but it is strange for me so i wanted to instal windows 7 on my pc. I inserted Window 7 disk and started to install it and i formated Ubuntu but the disk what i was using was damaged and it could not complite the installation and now i dont have any programs in my pc. Problem is that i got another disk but i cant boot anymore my pc, i select drive and stuff and then comes error.

error: unknown filesystem grub rescue- i tryed different commands but those didnt worked.

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Ubuntu :: Error Unknown Filesystem Grub Rescue

Nov 17, 2010

I had dual boot with windows 7 and ubuntu 10.04 running, and working. In my grub menu on startup I could choose (among things) something called Vista loader. Dont know why, since I installed windows 7 and not vista. Could also choose windows7 and ubuntu, both worked.

Today I accidentally pressed the vista loader, and now I get the following error upon boot: Error unknown filesystem grub rescue

So the next thing I did was download the latest ubuntu and boot from live cd. I followed instructions [url] on how to purge grub2 and reinstall it, and did so with out any problems. However the same error remains when I boot.

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Ubuntu :: 10.10 - Grub Rescue (Unknown Filesystem Error)

Apr 19, 2011

I just recently decided to install Ubuntu alongside windows 7 64bit. I was working fine until I decided to increase the partition size of the unused space to take up some space of an unused partition I had made earlier. When I tried to reboot windows I got the error -
error: unknown fileystem.
grub rescue>
I have tried a windows repair disc with no results, it cannot find any problem with the startup routine and I have looked at many different tutorials and information about how to restore grub using command from the grub rescue menu. Ubuntu 10.10

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Ubuntu Installation :: Grub Error: Unknown Filesystem After Upgrade To 11.04

May 2, 2011

I tried upgrading to 11.04 this morning and after rebooting grub left me at the grub rescue> prompt with the message 'error: unknown filesystem'. I've tried purging and reinstalling grub using a live-cd but no joy.

Let me know what additional information to provide. EDIT: Here is the output from the Boot Info Script

[Code]...

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Ubuntu :: Not Booting - Error: Unknown Filesystem Grub Rescue

Mar 18, 2011

my ubuntu installation has stopped booting after i deleted and again created one of my partitions (not the ubuntu partition but my data partition). but now when i switch on my netbook it says: error: unknown filesystem grub rescue>

i used gparted live to resize. this is my disk partition structure:

[Code]....

before doing this, my ubuntu partition was /dev/sda7, the swap partition was /dev/sda 6, and the data partition was /dev/sda 7.

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General :: Error - Unknown Filesystem - Grub Rescue

Jan 9, 2010

I have dual boot with Ubuntu 9.10 and Windows 7. Today, after using Partition Wizard on Windows to resize its partition, I got the following message when reboot:

Code:

I dont actually know what to do, I've been reading some threads on the internet but nothing equal to my case, only people who installed Windows after Linux and lost GRUB. Do I just need a live CD to reinstall GRUB? Can somebody tell what to do?

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General :: Restart My Laptop - Grub Error - Unknown Filesystem

Sep 30, 2010

I have windows vista. i tried installed linux-ubuntu 9.10 but not knowing after a point on how to proceed further, i quit half-way. so my partition (14 gb)remained wasted. i tried installing again in a new partition and got it done. from my newly installed lunux, i tried to delete that 14gb partition. and now when i restart my laptop, i get this error :

GRUB loading.
error: unknown filesystem
grub rescue>

I would like to know what exactly has happened and how do i get this resolved.

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Ubuntu :: Rebooted By Ctrl-alt-delete - Error - Unknown Filesystem Grub Rescue

Oct 28, 2010

I've recently installed Ubuntu 10.10--it had Windows 7 on the machine before but wiped that off so it is not dual boot.

The upgrade manager prompted me to install about 170MB or so of upgrades. I chose to install everything and then rebooted. Upon rebooting I received an error (sorry but didn't record it).

I rebooted by ctrl-alt-delete and then got the error: error: unknown filesystem grub rescue.

How do I get back my installation?

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Software :: While Dual Booting Ubuntu And Xp - Grub Error Reason: Unknown Filesystem

Jul 19, 2010

My friend recently installed ubuntu to his existing computer which had windows XP. Today when he tried to start the PC it showed the error

[Code]...

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General :: Error On Startup - Unknown File Filesystem Grub Rescue> ?

Mar 7, 2011

Yesterday I installed the latest version of ubuntu to my computer that was already running windows 7. I had everything working fine until in windows I deleted a partition that had nothing in it.

After this I restarted but I can't get into either OS. I get an error that says Error: unknown filesystem grub rescue>

I think I need to fix something in grub. I have been booting off of a usb stick with linux on it in the mean time.

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General :: Error On Startup. Unknown File Filesystem Grub Rescue> ?

Mar 7, 2011

Yesterday I installed the latest version of ubuntu to my computer that was already running windows 7. I had everything working fine until in windows I deleted a partition that had nothing in it. After this I restarted but I can't get into either OS.

I get an error that says Error: unknown filesystem grub rescue>

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General :: Error - Unknown Filesystem, Grub Rescue > - Computer Just Freezes

Jun 2, 2011

If I could I would change the boot order but I can't do that (I have a Dell Studio 1747). I try F2 to enter the BIOS set up, but I still end up with that error and never get to the setup. F12 doesn't work either (F12 is for the boot order) so I can't boot from the DVD with the Win7 installation DVD as the computer just freezes and I can't get past the Dell splash screen.

I have tried to remove the coin battery on the motherboard in an attempt to reset the BIOS but that didn't work either.

So...

F2 = error
F12 = freeze
Reset bios by removing coin size battery = no change

I assume there is no use reformatting the HD by attaching it to another computer and re-install Win7. Is it a motherboard problem?

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Ubuntu :: Grub Rescue Error Unknown Filesystem - Fsck From A Live CD But It Doesn't Work

Sep 16, 2010

Yesterday my computer froze using ubuntu 10.1 so i turned the power off, then back on, now i get this message when trying to boot: error unknown file system Grub Rescue>

I tried fsck from a live CD but it doesn't work.

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Ubuntu :: Delete A Partition And When Boot Message Appears - Error - Unknown Filesystem Grub Rescue >

Oct 23, 2010

Just delete a linux partition and now when i boot a message appears and says error: unknown filesystem grub rescue >

I have search on the net for this problem and i have understand it a little. But my situation is a bit different and because i don't want to format my hard disc i wanna try to fix it. So before a couple months i download ubuntu 9.10 and i installed it a month later. But my computer used to crash all the time and i couldnt use it. So i download the latest ubuntu 10.4 and install it while having windows xp and the old ubuntu 9.10(so i had windows xp, ubuntu 9.10 and ubuntu 10.4 partitions). Now i tried to delete the partition of ubuntu 9.10 from disc utility. so i have the message i wrote above when i boot. I dont wanna delete my windows xp and ubuntu 10.4. what should i do to stop this message from appearing.

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General :: Error - Unknown Filesystem. Grub Rescue> - No Longer Have The Install Disk For Windows Vista

May 11, 2011

error: unknown filesystem grub rescue>

Background: My mother's HP laptop had Ubuntu and Vista on it, Ubuntu my brother's doing. He decided he wanted to take off Ubuntu yesterday (he had forgotten the password), and deleted the partition that it was contained within. The computer now boots to this error.

Inventory: We no longer have the install disk for Windows Vista, he cannot tell me what version he used of Ubuntu, what partition it was on, any of the specs for the machine, or generally any information about the system. All I am aware of is that error on the boot-up screen. I have nothing else to work with.

I would like to remove Grub, and Ubuntu, and leave Windows intact (the request of the owner of the computer), but I have no idea what commands I could use to get rid of either when I can't access Windows, or how to properly remove them if I did access Windows.

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Ubuntu Installation :: Grub Rescue Prompts After Formatting / "error: Unknown Filesystem"?

Sep 1, 2011

I had Ubuntu and Kubuntu installed to dual-boot using the GRUB loader installed by Kubuntu. I mistakenly formatted the Kununtu partition to NTFS in an attempt to install Windows XP in its place without updating grub to pull the files from my Ubuntu partition.

Now, when I go to boot the computer, I receive a the "error: unknown filesystem" and the grub rescue prompts for commands. I've attempted to boot from both a Ubuntu Live CD and a Secured Ubuntu CD with boot repair built into it, but receive the same message both times. I know this isn't an issue with my boot order (I've changed that), and my computer will boot into a Windows XP setup disc (which will not proceed for a different reason)

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Ubuntu :: Grub Loading - Unknown Filesystem Rescue Grub

Jan 31, 2010

Yesterday I partitioned my hard drive with kubuntu netbook remix and windows 7. after a few hours and reboots i turned on my computer and it said Grub loading. unknown filesystem rescue grub> It looks like allot of people have been having similar errors recently with windows 7.

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Ubuntu :: 10.04 Clean Install Causes Grub Unknown FileSystem

May 7, 2010

I upgraded from 9.10 to 10.04 and during the upgrade it asked to install a new version of grub or keep the current one. Thinking that I should just upgrade the grub just to make sure that I had the latest version I decided to do it. So I told it the partitions to use the ubuntu, ubuntu swap, vista, and vista recovery.Finished the upgrade and restarted.I tried to boot into both the vista, and vista recovery but I noticed something weird. Grub switched the names, the actual vista install is called recovery, and when you tried to load it, a blinking cursor would appear for a split second and then loop back to grub. If you tried to select the vista recovery now called vista it would just sit at the blinking cursor for infinity. But booting into ubuntu worked.

So I decided to wipe ubuntu and do a fresh install of 10.04. Went through and set up the swap and ext4 partitions at the end of the hard drive(because I would like to expand the windows directory should I ever be able to boot into it). Now when I start up and select vista recovery now called vista it sits at the blinking cursor just as before.

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Ubuntu Installation :: Unknown Filesystem, Grub Rescue> No Windows?

May 25, 2011

I am trying to install ubuntu 10.04 lts on three of my schools old computers, they are all old Celeron computers, all basically exactly the same, it installed flawlessly on the first one but on the second after restarting after fresh instillation it boots to an error saying "unknown filesystem, grub rescue>" I've reinstalled 3 times, I've looked for others with the same problem but they are all related to dual booting with windows, I wiped windows, there is mow windows involved

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Ubuntu Installation :: Unknown Filesystem Grub Rescue Message On Reboot

Oct 25, 2010

I am fairly new to linux and my laptop froze so I rebooted it and now I have this error. I have tried to load the files needed using the prompt but nothing seems to work so here is my bootinfoscript thing. Any way for me to reinstall ubuntu over the sda5 partition but keep my files?

Code:
Boot Info Script 0.55 dated February 15th, 2010
= Boot Info Summary: =
=> Grub 2 is installed in the MBR of /dev/sda and looks on the same drive in
partition #7 for /boot/grub.
=> Syslinux is installed in the MBR of /dev/sdb .....

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Ubuntu :: Error: Unknown Filesystem?

Mar 22, 2011

having a bit of a problem here. I woke up this morning, and my computer was froze. It does this from time to time, the monitor won't respond and wake up, flashing lights in the keyboard etc. Well anyways, I turned it off, then turned it back on, and it says:

Code:
error: unknown filesystem
grub rescue >

[code]....

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General :: Unknown Filesystem, Grub Rescue Mode. Win7, Then Ubuntu Were Installed?

Sep 24, 2010

A few days ago I decided to try a linux OS for the first time. Following a how-to advice, I created a ~80gb partition (on a 320 gb sata disk) for Win7 and installed it. Then I installed Ubuntu 10.04, chose to make partitions manually, created a primary ext4-partition (right after the one with Win7) for / and a 1024mb swap partition. So now the disk is parted this way: 512 booter - Win7 system, ~ 80gb ntfs - Ubuntu /, 8 gb ext4 - Ubuntu 1 gb swap - file storage, ntfs ~240 gb (created using Win7 bootable disk, but the issue from below started before this).

After the installation the boot loader failed to load any system, giving the error from the topic title. I tried several ways to reinstall/repair/reconfigure grub in the live-CD mode. Some of them didn't change anything, others were not completed because of an update-grub error ("cannot find a device for / (is /dev mounted?)"). Grub version is 1.98b. The disk with Win7 and Ubuntu is treated as hd0 in grub and sdd in Ubuntu
ote: even though the thread is marked as SOLVED, the issue is actually not. I have managed to dual-boot Win7 and Ubuntu, but with partition configuration changes

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Ubuntu Installation :: Error: Unknown Filesystem - How To Fix It

Jul 14, 2010

I have a laptop with windows7 and ubuntu installed. When I installed Ubuntu it created 4 partitions (2 for swap and 2 for ubuntu). Yesterday, a friend of mine deleted one of the partitions (swap+linux) because they weren't being used (weren't even mounted) and he thought I could use the free space. I kept on using the laptop but today I had to reboot it. Instead of getting the usual grub menu I got this:

Code:

error: unknown filesystem.
grub rescue>

I tried using the solutions I found in lots of posts related with this matter but I couldn't fix it. What I tried was this:

Code:

#show you the available partitions
ls
#look for boot files on the partitions
ls (hd0,1)/boot

[code]....

The problem is that it doesn't recognise the commands 'linux', 'boot' or 'initrd'...

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Ubuntu :: Unable To Boot - Error - Unknown Filesystem

Oct 24, 2010

I am using Ubuntu 10.04 and am having a major issue with it not booting. My PC worked fine yesterday but when I tried to boot this morning I get the error "error: unknown filesystem" and under that I get the "grub rescue>" prompt.

At first I thought this was just a problem with Grub that would be easy fixed so I put in my Ubuntu USB and loaded it up in live mode. But when I try to look at my file system from within the live environment I can't seem to see any of my files.

I have looked at the drive in GParted and my main file system (/dev/sda1) shows up as 'unknown', while the swap partition (/dev/sda5) shows up as it should. I have also looked at the drive with the Disk Utility and the SMART Status says the disk is healthy.

I am really concerned about this as currently the system is totally unable to load, not only that but I am also unable to recover my data from the drive which is my main concern as I havent done a backup for quite some time and I have a lot of python code that I have been working on that I really need to get back.

Has anyone got any idea of what to do and how I might be able to sort this out or at the very least recover all my data. I can't understand why this has happened I have not made any changes to the system recently other than installing the updates that came through yesterday. This is a really urgent issue for me and any help will be very appreciated.

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OpenSUSE :: Virtual Box Error - Filesystem Unknown

Mar 22, 2011

I am experiencing a problem with virtual box 4. Did an install from binary, and everything went ok and virtual box launches, but once I have created the virtual disk and the want to run it, I get an error, and the log says that it has to do with the ext4 filesystem and has a known kernel bug. How does one go about sorting this out. Here with the log from virtual box.

00:00:00.654 VirtualBox 4.0.4 r70112 linux.x86 (Feb 17 2011 17:29:29) release log
00:00:00.654 Log opened 2011-03-22T15:50:28.174435000Z
00:00:00.654 OS Product: Linux
00:00:00.654 OS Release: 2.6.34.7-0.7-desktop
00:00:00.654 OS Version: #1 SMP PREEMPT 2010-12-13 11:13:53 +0100
00:00:00.654 DMI Product Name: HP Pavilion dv6700 Notebook PC
00:00:00.654 DMI Product Version: Rev 1
00:00:00.655 Host RAM: 1988MB RAM, available: 1595MB .....

Then tried moving the vbox files to my home partition which is ext3, but it says that file system is unknown, again herewith log:
00:00:00.589 VirtualBox 4.0.4 r70112 linux.x86 (Feb 17 2011 17:29:29) release log
00:00:00.589 Log opened 2011-03-22T16:06:15.412283000Z
00:00:00.589 OS Product: Linux
00:00:00.589 OS Release: 2.6.34.7-0.7-desktop
00:00:00.589 OS Version: #1 SMP PREEMPT 2010-12-13 11:13:53 +0100
00:00:00.589 DMI Product Name: HP Pavilion dv6700 Notebook PC
00:00:00.589 DMI Product Version: Rev 1
00:00:00.590 Host RAM: 1988MB RAM, available: 1476MB .....

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Ubuntu :: Mounting EXT4 Drives - Unknown Filesystem Error

Mar 6, 2010

I need to examine a hard drive that came from another system running Ubunut Server (not sure what version). I know the drive has LVM on it, so as far as I understand that means the drive will be treated as EXT4 for mounting. I can't boot from the actual disk, but I have used a IDE to USB connector to make a binary copy of the drive, which I've mounted as a loopback device. However, when I try to mount the loopback device properly, I get this:

root@~je:/# mount -o ro -t ext4 /dev/loop0 /mnt
mount: wrong fs type, bad option, bad superblock on /dev/loop0,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so

I tried using -t ext4dev too, but that just gives an unknown filesystem error. The file I've got mounting in /dev/loop0 is a .dd file, created by imaging the drive using dcfldd on the server drive while it was mounted (as /dev/sdb). System I'm working on is running Ubuntu 9.10. All I need is to be able to mount the server drive so I can traverse the file directories, there's a few things I need to check on it. If needed I can dispense with the whole loopback setup and just directly connect the server hard drive again using the IDE to USB cable, but I'd rather not do that; it's imperative that the drive doesn't get altered, or at least as little as possible.

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