General :: Grub Multiboot 2 Linuxes Filesystem Context?

Oct 22, 2010

Does anyone know if the context is related to the current filesystem, or the one defined in root setting grub.conf.


title LinuxX
title LinuxY


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General :: Setting Up Grub To Multiboot

Jun 1, 2011

I am a new user of Ubuntu and I am having problems setting up GRUB to multiboot Windows 7, Windows Vista, and Ubuntu 11.04. Following this guide

I got to the point where I need to save the file called '11_Windows' However, in the terminal after trying to save it. (ctrl + x, yes to the save dialogue, then pressing enter) I come across an error that says ' [ Error writing /ect/grub.d/11_Windows: No such file or directory ]'I have spent about an hour trying to find round about ways to create/ save this file and none of them have worked. If someone could tell me what I am doing wrong or what I need to do, it would be greatly appreciated.

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Software :: Grub Error 2 On Multiboot Machine

Apr 6, 2010

I've installed 1 130GB Vista partition, 13 10GB Linux partitions and 1 8GB swap partition on my desktop machine. After the last install (on hd0,1) I copied the info from the menu.lst/grub.conf file from each partition into 1 file and replaced the menu.lst file in the last installation (sda2) with that large file (removing duplicate entries).

Now, when I boot I get a list of boot options for all 14 partitons (includes Vista). However, I can only access 5 of them. The others return a grub error 2 message: Bad File or Directory Type. As a note, "Super Grub" boots them all but takes some trial and error to get the specific correct entry. I'd like a simple menu (could live with some drop downs from main menu).


As I stated, "Super Grub" boots all - but with some "gyrations" on several entries. My purpose is to use the machine as a demo to induce fellow workers to swithc to Linux. Hence, would like a more simple menuing system on startup. For info: the partitions that will boot are sda1,2,5,11,and 12. sda2 was the last partion installed. sda4 is swap.

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OpenSUSE Install :: Multiboot Bootloader - Cannot Restore Grub

Apr 13, 2011

I installed Gnome 3 on a free partition of my netbook but I lost the boot to my suse kde...(MBR). I launched a live CD on USB but cannot restore Grub; the only way is to reinstall the KDE. Then it boots but does not show Gnome 3. Why the installer does not take into account both OS?

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Ubuntu Installation :: Multiboot - Change Which Version Of GRUB Is Used When Boot Up?

Aug 18, 2010

I'm having an issue with GRUB, I have four OSes on my hard drive. Here they are in the order I installed them:

Windows 7 (Windows bootloader)
Ubuntu (GRUB 1.97)
Debian (Some ancient bootloader)

(For those of you unfamiliar with it, YLMF OS is an Ubuntu-based distro re-skinned to look like Windows XP. Other than the theme and branding it's exactly the same as Ubuntu) Each time I installed another operating system, it replaced my original bootloader with its own. I made the mistake of installing Debian last, thus leaving me "stranded" with an old version of GRUB. Since at the time I was relatively inexperienced with Linux, I solved the problem by reinstalling Ubuntu, which then replaced the bootloader with GRUB 1.97.

I mainly use YLMF OS, and so when I wanted to change some GRUB menu settings (the default entry, timeout, etc.) I naturally changed the /etc/default/grub file in the YLMF OS partition, not the one in Ubuntu. Once I rebooted I realized that my changes weren't being applied for that reason. Thus my problem is that my computer is using the GRUB that Ubuntu installed, not the one YLMF OS came with. How do I change which version of GRUB is used when I boot up? Yes, I could just change the settings in the Ubuntu partition, but YLMF OS came with the newer/est version of GRUB, so I want to use that instead.

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General :: Unkown Filesystem. Grub Rescue?

Dec 1, 2010

My laptop was running Vista just fine. I had and wanted to install Linux and chose Ubuntu. I installed it to a USB and booted using this USB. It installed just fine and ran fine one time as well!When rebooting and wanting to run Windows, I got the diskcheck screen and let it run. Windows booted fine afterwards.On my next reboot all I got and still only get is the following

error: unkown filesystem.
grub rescue>


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Ubuntu Installation :: Chain GRUB From Truecrypt And Its Bootloader (multiboot Alongside XP)

Aug 23, 2010

I want Truecrypt to ask for password for Windows XP as usual but with the standard [ESC] option, on selecting that, i.e via Escape key, I want it to find the grub for the (unencrypted) Ubuntu install. I've installed Windows XP on the 120Gb hard drive of a Toshiba NB100 netbook then partitioned to make room for Ubuntu 10.04 and installed that after the Windows XP install. When I encrypt Windows XP, Truecrypt will overwrite the grub entry in the master boot record (MBR), I believe (?) and I won't be able to choose between XP and Ubuntu anymore. So I need to restore it back.

My setup:

Windows XP, NTFS (to be encrypted with Truecrypt), 40Gb
/boot (Ext4, 1Gb)
Ubuntu swap, 4Gb


The key area of the problem is how to instruct Truecrypt when escape key is pressed, and how the Grub/Ubuntu can be made visible to the truecrypt bootloader to find it, when the esc key is pressed. Also knowing as chaining.

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General :: Grub: Kernel Parameter RO But Filesystem Still Gets Mounted Rw?

Jan 13, 2010

I am trying to do a fsck on my ext3 partition, but so far failed to let the system come up in single user mode and having the partition mounted read only. It says in the kernel parameter that it is read only (RO) but still mounts it RW. A remount with mount -o remount,ro does not work, since / is always busy. what to do to get a fsck done? I don't want to boot into a rescue system, this should be possible on a running system (like Windows does it, when rebooting)

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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:


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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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.


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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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 :: 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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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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General :: Detect Filesystem Type (can't Mount Filesystem Image .img)

Mar 11, 2011

I am trying to mount a file image, like this

mount -o loop /tmp/apps.img /media/apps

But I get the following:

mount: you must specify the filesystem type

I try ext3:

mount -o loop /tmp/apps.img /media/apps -t ext3

dmesg says:

error: can't find ext3 filesystem on dev loop6.

I've also tried ext2, vfat etc. How can I detect the filesystem type of apps.img?

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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.


[ 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.


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General :: External Drive Read Only - WARNING! Running E2fsck On A Mounted Filesystem May Cause SEVERE Filesystem Damage

Mar 24, 2010

I've had a look at some similar threads but as I'm very new to linux they're already a bit technical for me. Sorry, this calls for someone with patience. I gather from other threads that disconnecting an external drive without unmounting is a no-no, and this seems to be the likely cause. Now the disk is read only and I'm unable to change any settings through the usual control panel on ubuntu. I'm just not familiar with the terminal instructions. I tried to cut and past a few command lines from other threads but I got some warnings that proceding could damage data. Like this one: WARNING! Running e2fsck on a mounted filesystem may cause SEVERE filesystem damage.

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General :: How To Make Multiboot DVD?

Nov 23, 2009

how to make multiboot dvd with following


i am new to this plz give exact step to make it??

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General :: Partitions For Multiboot

Feb 5, 2011

i am trying at the moment to setup up a multiboot system on my laptop, i need to keep windows 7 on it for work purposes, but i am planning on installing 4 different distros of linux on there as well, after windows i have over 400 gig spare so what i wanted to do was create 4 partitions of 80 gigs each plus a swap drive partition that each distro of linux can share, is 80 gig each enough for fedora security lab, kubuntu, ubuntu multimedia studio and linux mint 9? also what format should i partition each as? can i make each distro create a home drive within its own partition?

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Ubuntu :: GRUB Says My Filesystem Is Damaged?

Jan 20, 2010

GRUB says my filesystem is damaged and it gives me a "grub rescue>" prompt.

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General :: Multiboot / Upgrade From LVM-based Partition

Dec 27, 2010

I currently have FC3 Linux which installed itself on the hard disk using LVM partitioning, so it is basically all one big partition. I would like to try some other distributions and upgrade to something newer, but don't want to lose my current capabilities and data files, and I know nothing or less about LVM. Is it possible (and if so an example would be nice) to install a non-LVM-based distribution on the LVM disk and have multi-boot options? Or do I have to start over new and drop the LVM? My guess is that I should save my /home (data files and .rc files) on a backup device first, then somewhere/somehow create a new partition for installing another distribution.

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General :: Installing Multiboot ISO On Flash Drive?

Jun 7, 2010

I've been trying to install multibootisos.exe on to my flash drive. Instead of getting the menu like in the picture I get a black screen that looks somewhat like a command prompt. I am using an 8G PNY Attache flash drive.

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General :: Chainloading Grub2 For A Multiboot Setup?

Nov 24, 2010

Don't know if I should have posted in Ubuntu specific section but since it involves grub2 and a quirk in my bios, I have attempted to multiboot 3 Windows versions and the problem I had was intalling a second Ubuntu. (Don't ask!) I had success multibooting with grub legacy on an older computer but this computer has a tricky mb which won't let me install grub to the second drive on an IDE port. What I mean by this is that since I already had boot files to the older drive in mbr- it won't allow me to install to mbr of the other drive in IDE port even if set first in bios boot order, my old computer allowed me to do so, exept perhaps its because 2 HDD were SCSI... (I have other HDD installed in RAID 0 on the other sata ports supported by mb (fakeraid) but I will use these for video editing as scratch disks later. One other HDD used for data is on the Raid port but not in an array).

I succeeded in installing Ubuntu desktop only after realising that I had to first switch my disk order in bios- otherwise the system would just hang. U. Desktop grub had sucessfully found Win bootloader links to both XP and Vista. I then installed Win 7 and used easy BCD and grub2 boot entry to link back to my Ubuntu Desktop grub 2 menu.

The problem occured when installing Ubuntu Studio ( for which I created a separate /boot partition) and I decided to install grub2 to mbr since it had correctly detected all my OSes! But then it seems it never installed correctly to the mbr. I still had Win 7 BCD bootloader in MBR! I tried to link easy BCD boot entry to the /boot drive but that didn't work and I ended up having to reinstall Win7 because I had overrid the BCD with faulty neogrub mapping entries- which I then removed and kept the orginal neogrub that still points to Ubuntu Desktop grub menu.

I also now realise that because I installed Ubuntu Desktop before I switched the HDD boot order in bios- U. Desktop's grub.cfg sees root of Desktop grub differently than neogrub BCD does root=(hd4,7) vs multiboot kludge (hd3,6) and at first I tried to install grub in the wrong hdds and partitions- I based mapping on neogrub's to find /Boot (hd3,2) and (hd3, 1) which is wrong!

What I am attempting to do now is to chainload grub2 from my Ubuntu studio located in /Boot with what I thought was the right mapping but still no success:

menuentry 'Chainloader' {
insmod chain
set root=(hd4,2)
chainloader +1

yielded error: hd 4,2 cannot get C/H/S values press any key to continue, also when in terminal in Ubuntu Desktop in
grub> find /grub/core.img
Error 15: File not found

I will attach Boot_info_script; at this point I am too tired and afraid that I will keep on installing grub to the wrong drive!

Note: I somehow got a problem loading into XP after all these failed attempts and a system 32 file seems to have gotten lost-haven"t attempted to fix yet. Just wondering in passing what happens if I chainloaded into Windows by error- if that could have corrupted it? Right now 3 out of 5 OS are bootable. I hope I can repair it without messing up my mbr again. Another issue is that some devices are on busy IRQs and then suddenly its resolved and my onboard LAN suddenly stops working at times so I don't know if any of this could cause XP to get stuck at loading screen.

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General :: Clonezilla And Multiboot ISO Mount USB Drive

Feb 5, 2010

I have been able to get a few of my desired tools working 100% (dban, gparted, ophcrack, UBCD) but what I would ultimately hope to get working is CloneZilla! I was able to get the Clonezilla user interface to load correctly but when I choose any of the options I encounter an error "ntfs volume version 3.1" repetitively. I have a feeling it is because I am launching the iso wrong in my menu.lst config file for grub. This is what I have.

title CloneZilla
find --set-root /CloneZilla.iso
map --heads=0 --sectors-per-track=0 /CloneZilla.iso (hd32)
map --hook
root (hd32)
chainloader (hd32)

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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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General :: Second Hdd Install - Boot Loader Queries - Multiboot

Sep 11, 2010

I currently have 2 operating systems on my main hdd: Ubuntu and WinXP My current setup - [storage NTFS partition, solely data][17GB WinXP partition][{extended partion}Ubuntu + swap]: [URL] I have a second SATA hdd that I would like to install Arch Linux on to. It uses GRUB Legacy, and Ubuntu uses GRUB 2. I would like to know how I would go about booting this, and figure out where my current bootloader is installed to. i.e. /dev/sda or /dev/sda5 (the / ubuntu partiton)

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Red Hat / Fedora :: Filesystem Check After Power Outage - WARNING: "Running E2fsck On A Mounted Filesystem May Cause SEVERE Filesystem Damage"

May 18, 2011

I am very new to linux, and I have a question regarding the filesystem check (fsck). The power recently went out and when I tried to restart linux the following error appears:

*/dev/sda1 contains file system w/errors, check forced it then goes on to say..

*An error occured during the file system check. Dropping you to a shell; the system will reboot when you leave the shell. Give root password for maintenance (or type Control-D to continue) I wasn't sure what to do, but checked some other online forums and they suggested running fsck manually - so I typed in the root password - and used the command, "fsck -A -V ; echo == $? ==" it then gave the following message

*WARNING!!! Running e2fsck on a mounted filesystem may cause SEVERE filesystem damage
*Would you like to continue (y/n)

Again, I wasn't sure what to do so i just checked no. I then manually turned off the computer and was prompted at the beginning to press Alt-3. I was brought to another screen and it informed me one of the drives was degraded and suggested rebuilding the array. I tried doing this, but it still brings me back to the original error of, "/dev/sda1 contains file system w/errors, check forced," and the process continues.

Also, when I tried to rebuild the array, I didn't backup any of the data on our home directory before doing this (which was probably a big mistake). After being prompted to type the root password, I was able to give the ls command and look at all the directories...the home directory where our data was stored was empty and I am afraid I may have lost some information. Is there a possibility that data was lost when I was trying to rebuild using the old drives?

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Fedora Installation :: Install Grub On Fat32 Filesystem?

Dec 21, 2009

I have used ubuntu distribution in wich i can install grub on a fat32 Filesystem. Can i install Grub on a fat32 filesystem with Fedora 12?

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