Ubuntu :: Corrupt Mbr/grub Cannot Detect HDD
Apr 9, 2010
I have a dual boot windows xp/ubuntu64 9.04 rig at home. Ubuntu is installed alongside windows(if i worded that correctly?). well last night i got the infamous error #15. so i popped in the live cd and messed around with grub. well i changed grubs boot to point to h0,5 which is where ubuntu resides and as you can guess i can not boot. i want to change it back to h0,0 or h0,1 however the hard drive is undetected.
I tried windows repair console but same thing cannot detect the drive. I pulled the drive out slipped it in my other machine and still same thing. so my question is how can i go about editing the grub menu.lst if i can't mount the drive?
Maybe i can just install a new grub/mbr? but i cant figure out hot to mount the drive.
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Sep 10, 2009
What is an easy way detect corrupt movie file during or before using ffmpeg to encode them? is there a command I can use to check if the file is not corrupt and then pipe it ffmpeg or standard input?
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Nov 27, 2010
I think I managed to corrupt my master boot record, or have a very intractable problem with Grub.
I'm not sure how I did this, but my desktop will boot Ubuntu fine from a USB, but every time I try to install it, the install seems to go fine, but when I finish the install and the machine tries to boot the OS from it's hard drive, it does not work. The monitor does not get a signal and it just goes to sleep.
I tried posting here to resolve the problem before, tried everything on this thread: [URL]
But nothing worked.
I have even tried running the system from a USB, running a "shred" command for the hard drive and then reinstalling - my theory was that the shred command would destroy all the data on the hard drive anyway, and allow a "clean" install from whatever was corrupt on it, but no luck - when I installed Ubuntu on the hard drive, same problem.
I'm not clear where the problem lies now, I'm assuming there is something up with it's master boot record, but there are no partitions on it's hard drive and I started with a completely blank, unformatted drive.
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Mar 22, 2015
Im currently not an linux expert so I turn to this forum after several attempts to fix my issue with grub.
I had a dualboot single HD with both win7 and win8.1 when I decided to install debian wheezy from usb.
I deleted the win7 partition and installed debian there. The partition scheme is separate /home
After reboot I automatically get into the "Grub rescue mode" and now I´m stuck.
I tried the commands:
set prefix=(hd0,msdosX)/boot/grub/
Insmod normal
I have msdos1, msdos3, msdos5 and msdos6 but nothing is listing anything from the grub rescue mode.
I get the "UNKNOWN FILE SYSTEM" error and cant get past that.
I also tried booting into rescue mode from usb iso install but nothing happens when choosing to repair GRUB.
The listed devices in rescue mode are:
/dev/sda1
/dev/sda2
/dev/sda3
/dev/sda5
/dev/sda6
debian uses sdb 1-2 and sdb1 is the only option to Reinstall GRUB on but it gives me "Unable to install GRUB in /dev/sdb1 This is a fatal error" message
/dev/sdb1
/dev/sdb2
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Feb 28, 2011
I have an old BIOS (only 149 GB detected in 160 GB drive). I have installed very few OS as a result - Windows in first 80 GB , 2 distros (20 GB each) in next 40 MB which is within the 149 GB. On issue of "update-grub" grub seems to detect all OS and generates grub.cfg. But on boot , one distro does not appear in the menu.
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May 28, 2010
I installed lilo and it boots. How do I installed grub again. Do I just use synaptic manager to uninstall lilo and install grub?
[code]....
I know grub2 does not work, giving me error: ntoskrnl.exe missing or corrupt. I did install grub-legacy and it worked, but I had to re-install squeeze due to other problems. So, now I want to replace lilo with grub legacy.
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May 11, 2010
i did a fresh install of 10.04 on my asus 1005ha netbook (first-gen 1005ha, if it matters), and it works great. However, grub does NOT detect my windows partition. In gparted, the partition is recognized as "unknown". I can't mount it in ubuntu.
This is what fdisk gives me:
WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted.
Disk /dev/sda: 160.0 GB, 160041885696 bytes
255 heads, 63 sectors/track, 19457 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
[Code].....
My windows 7 is not corrupted. it is also not virus-infected. I know what i am doing, and i know my windows is fine. it has been running fine prior to installing ubuntu. I'm just saying this becuz i noticed that viruses are a common response to similar problems like this.
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Nov 15, 2010
i have a windows xp OS installed on C and on D ubuntu 64bit ! and i disabled from windows to see the booting manager where it shows me weather to choose Windows or ubuntu ! and the GURB menu , when it comes up i cant see windows !
Note: i tried the sudo update-gurb this or wtever command was it ! but also failed to show windows
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May 18, 2010
I'm using Ubuntu 10.04 Lucid LTS. I have problem with my Ubuntu,Whenever I ran "sudo update-grub" command it did not detect my Ubuntu kernel nor Windows XP installation on another drive (I installed Ubuntu and Windows in different drive).It just display "Generating grub.cfg" and then "done". No "Found kernel..." message.
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Jul 6, 2010
I recently installed Ubuntu Studio on my PC, dual-booting it with Vista. Once the installation had finished, and I had rebooted, Grub showed the two Vista options:
Windows Vista (loader)
Windows Recovery Environment (loader)
When I load up "Windows Vista (loader)" it opens my Acer eRecovery Management, but when I load "Windows Recovery Environment (loader)" it opens what looks like a normal version of Vista. Is it possible that on installation, Grub accidentally swapped the two around, or have I probably mucked up my computer?
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Jul 10, 2010
I am trying to dual boot my system. MS Vista and Debian lenny 5.05. Installed Vista first, need vista for voice recognition software. Installed Lenny second but grub does not see Vista. Installed NTFS-g3 so I can read and write to /dev/sdc1 where my vista is. But grub still does not detect it. Installed grub2 and upgraded from legacy but still grub2 does not see the vista partition.
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Feb 10, 2010
I have just suscribed into this forum. I have a problem: my notebook (NOTEBOOK SATELLITE L300-SP5917A - INTEL CORE 2 DUO T6400 (2.00 GHZ - 2 MB L2 - 800MHZ FSB) - 15.4 WIDESCREEN TRUBRITE TFT LCD - 400 GB SATA 2 .5 5400 RPM - 3GB PC2-6400 DDR2) doesn't boot ubuntu after the last security upgrade. I have wubi installed.I have Windows Vista and Ubuntu in the boot menu. I select "Ubuntu" and that leads me to the GRUB shell. I'm new in linux. It seems that GRUB doesn't detect the kernel. Maybe the file menu.lst has been deleted, or something similar, but I can't make my ubuntu to boot.
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Dec 4, 2010
I followed [URK] to have a splashscreen for my GRUB in 10.10. It is able to detect the splashscreen but does not show up when I boot the machine:
[Code]....
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Dec 9, 2010
I have RAID1.. throgh SATA cable..One of my HDD got failed to detect...hen i chkd other hdd is detecting in BIOS but i couldn't boot.. It says GRUB Hard Disk Error.
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May 12, 2010
I installed Debian on a old hard drive (quantum 5gb) and ran with it for a couple of days.. BUT all my data (including windows) is on my other hard drive.. so my question is What do I have to do to make grub detect windows and linux when I attach the 2-nd hard drive?
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Sep 7, 2010
I've installed Lenny with no problem, but I tried switching to Squeeze, and grub for some reason didn't pick up on the Windows partition this time - it just shows the two Linux options (debian and debian single-user). I check the menu.lst file (which I've edited under Lenny with no issues), but for some reason it doesn't exist at all in this install. Is it in a different location with Squeeze maybe?
why grub didn't pick up on my Windows install?
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Oct 13, 2010
I've just installed Fedora (F13) for the first time, on a new HDD, to give myself a dual-boot system. So currently I have:
So, at the appropriate stage in the install menu, there is an option for where to install GRUB, and a drop-down to choose which drive is the primary BIOS boot drive.
However, in both cases, no other drive except my new sdc is visible. So, I can install GRUB to MBR of sdc, or to first sector of boot partition - but no option to put it to my primary boot drive MBR on sda.
Likewise, in the GRUB configuration page, if I go to Add another OS, the only option it gives me is my new Fedora install. It doesn't list the Vista OS on sda at all.
The result is that I can boot to either OS by changing the boot drive priority in BIOS.
I guess my question is this:
- is this expected behaviour from the installer, meaning that I'll need to configure GRUB manually somehow? (gulp ) or
- did I do something wrong in the install process? or
- is this some weird bug manifesting itself?
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Apr 23, 2010
I got a problem booting ubuntu 10.4 RC but i solved it by replacing root partirion uuid in grub boot menu then I disapled totally uuid passing to linux from /etc/default/grub . but something else i noticed why grub choosed insmod=ext2 why not ext4 specially I use now ext4 .I tried by editing the grub boot menu replacing "insmod=ext2" by "insmod=ext4" it booted and the three lines error during booting that i used to see them science ubuntu 9.10 totally disappeared . really I dont understand can anybody explane for me.and if what i did was right ,can anybody tell me how to make grub always and permenantly detect ext4 as ext4 not as ext2.
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May 29, 2011
I've installed Squeeze 2.6.32-5-amd64 on my laptop (Alienware M17X R3, Intel i7 Sandybridge, ATI Technologies Inc Broadway [ATI Mobility Radeon HD 6800 Series])The screen is 17", with maximum resolution of 1920 x 1080. After a default install of the operating system, the maximum resolution I can select is 1280 x 1024.My research so far has suggested that I need to edit the /etc/X11/xorg.conf file and provide xorg with the necessary resolution.
Again, by default, the xorg.conf file is not created. This leads me to believe that xorg is scanning my hardware at startup and providing me with whatever it thinks is appropriate. I tried following these instructions to generate an xorg.conf file. This process created an xorg.conf file under /root/.
When I copy this xorg.conf file to /etc/X11, I get a blank (i.e. black) screen. Deleting this file restores the default resolution 1280 x 1024.This system is dual booting with Windows 7. Under windows I am able to get a 1920 x 1080 resolution, so I know my hardware is up to it.At this stage I have yet to install the drivers for the Radeon graphics card.What are my options regarding configuring xorg to give me a higher screen resolution?
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May 2, 2010
I have a new F12 install, and my syslog is filling up with messages about USB. I have 2 USB devices plugged in directly to the mobo (bluetooth keyboard receiver, touchscreen), and it keeps redetecting them and then disabling the port for some reason.
A small sample of what keeps on repeating:
Quote:
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Jan 12, 2010
Code...
To find the appropriate firmware without knowing the make or brand of your wireless chip, you can use the command:
#fw-detect
But apparently debian package do not offer this useful tool, well, certainly for sidux exclusively.
Is there a package of fw-detect eventually?
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Sep 21, 2010
So, onto my question. I kind of messed up my desktop computer trying to remove Ubuntu 8.10. I had installed 8.10 as a dual boot with Windows XP a few years back and now wanted to remove it mainly because of my mother, who can BARELY even turn a computer on. Plus, I can't connect to the internet anyway with Ubuntu (I need the Netzero dial up application in windows, since all I have right now is dial up).
Here's what I did. I downloaded the program "MBRFIX" so I could directly fix the mbr inside of Windows XP, since I don't have an XP recovery disc. I downloaded MBRFIX because I needed to get rid of GRUB. I fixed the mbr, and Windows XP directly booted. All was said and good, except Ubuntu still existed. I poked around on the internet and found something that said for me to use the Ubuntu Live CD and go to gpartition. It said to delete the Ubuntu partitions. So, I tried that, but it said something about unmounting something (I honestly don't remember what it said).
So, I continued following instructions. It said if you couldn't delete the partitions, to go to the terminal and type in "sudo swapoff" and then "sudo umount -a". So I did that. A bunch of stuff popped up in the terminal, mainly stuff that said "cannot unmount". I tried to delete the partitions once again, but that still failed. Finally, I just went back to Windows XP. I went to my computer, manage, and deleted the Ubuntu partitions from there. Finally, Ubuntu was gone! Of course, I wanted my 50GB space back on my XP, but I still had no clue how to go about putting that back. ........
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Apr 10, 2011
I recently copied about 1TB of videos from one drive to another. Now it seems like my videos(a lot but not all) are choppy or just end up freezing(mkv files seem to be the ones freezing).Is it possible that the transferring of a large amount of data could have damaged my videos?
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Apr 11, 2010
Corrupt Dictionary for Firefox (en-us)(en)? I'm running 3.5.9
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Apr 16, 2010
im running beta 2 of 10.04 x64 and ive noticed a problem where for some reason whenever I download a file it always gets corrupt even though its a 100% complete.
Ive tried using wget instead to download the file and that worked fine
ive removed ubufox package and its now working fine
Is anyone else having this problem?
I wanna be 100% sure that its not my fault and is really a bug before I submit it
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May 19, 2010
another day, another problem with Ubuntu The day rapidly approaches where I put XP back on this old machine, unfortunately
why Docky's 3D background looks like this?
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Aug 18, 2010
I'm running Xubuntu 10.4 and TB 3.0.6 from the repository, and the damndest thing has happened. Thunderbird was working, and then it stopped sending email -- literally from one email to the next. In fact, I didn't even notice it for three hours.
I never got an error message or a timeout or any of the typical problems; rather, I typed the email, hit send, and then it vanished from the screen. I don't get a progress bar on the bottom or a sent message line, and the message doesn't go into the sent folder. I can receive email, and my Internet connection is working.
I tried all the usual stuff -- checking the settings (which I haven't messed with), deleting each of my accounts and putting them back, looking for rogue extensions (again, I didn't add any between the time it worked and it didn't), and uninstalling, purging, reinstalling, etc. I even ran a virus scan.
But it gets weirder. I installed Evolution, and it works fine. And so does Spicebird, which is basically Thunderbird in prettier clothes. So the problem appears to be with the copy of Thunderbird that I have installed, since I haven't heard of anyone else having this problem.
Any thoughts? If this was Windows, I would assume that the software was corrupted or missing a ddl (or whatever), but I've never seen this happen on a Linux system.
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Oct 27, 2010
I'm trying to install 10.10 Alternate AMD64 on a laptop (eMachines e510) in order to then install a minimal desktop.I haven't found anything about this issue outside of this page, which describes the problem I encounter well: [URL]It basically happens right when the base system installation starts.The link shows screenshots of it.I tried burning a CD at minimum speed, and the CD check indeed says the files are corrupt.
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Jan 19, 2011
I think my upgrade from 10.04 to 10.10 got corrupted. The update manager got half way through upgrading the system and then complained about some dependency. I forgot I hadn't closed the update manager and ran synaptic with it still open to update some packages. In any case I think the system got in a mess as
Code:
cat /etc/issue
gives
Code:
Ubuntu 10.10
[Code]...
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Jun 13, 2011
I've just tried to open an .odt file which says it's corrupt and cannot be recovered... The last backup I can find is from about a month ago and is 10,000 words shorter than the corrupt version.I have no idea why the file has suddenly become corrupt
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