Ubuntu Installation :: How To Boot From 'grub Rescue'
Jun 5, 2010
I've got Ubuntu 10.04 installed on one partition, and Windows Vista on another. I was messing around with my partitions, and now I can't boot to either one. I just get an error when I boot up on GRUB which says "error: no such partition", and then a prompt saying 'grub rescue>'. I've read up on other people's posts, and they said that I should reinstall GRUB from a livecd, but that doesn't look like it does anything. It seems that GRUB is trying to boot from hd0,8, and that doesn't exist anymore. I can change the 'root' and 'prefix' variables to the right partitions, but the 'boot' or 'chainloader' command doesn't work. You should be able to boot from 'grub rescue>', because that's what it's for, right?
I just want to be able to boot into Ubuntu, not Windows.
PS: Sorry if I'm specifying way too much information(or not enough), I'm fairly new to forums.
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Dec 16, 2010
I updated yesterday and now when I start my laptop it goes in to grub rescue mode. I have booted from a 'live cd' and thought I could repair grub from there. In gparted however the partition with ubuntu (sda1) is seen as unknown file system, in terminal when I list the partition table it shows up as FAT16 type. When I try a grub-install it gives this error message:
[Code]....
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Jun 19, 2010
So I had Ubuntu Server installed and I decided to make some new partitions using gparted via a live usb of Ubuntu desktop. And so I think messed up pretty badly. Ubuntu Server won't boot and I get the following error followed by a grub rescue promt:
Code:Diskette drive 0 seek failure
error: file not found grub rescue >
To me, it seems like some boot files may be missing if not the whole system. After I made the partitions, the live USB of Ubuntu was still working fine until I rebooted.So here is the bigger issue, I figured I would just reinstall everything all over again, but instead I can't.
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Dec 15, 2010
So earlier today I was running out of space on my regular Windows 7 partition and I played around with extending it. I ended up somehow deleting grub and messing up my entire system. I've spent the last 2 hours looking for the answer to this and everyone has been saying to boot from a live disk and fix it that way.
Well, I've tried everything, the only way I can boot right now is via USB and it will NOT allow me to. I checked on other computers and even re-installed and formatted by external hard drive to try and get it to work and it refuses. I've changed my BIOS to boot from USB so I have no idea as to why this is happening. Also, I've tried using the "ls" command to find my partition via "ls (hdX,Y)/" and all of them come up as unknown filesystems.
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Apr 10, 2010
I have a SONY VAIO CW26 laptop. I got a Windows-7 version prepacked with the laptop.I installed Ubuntu Karmic 9.10 over a new partition that i created using the inbuiltfacility in windows7. Both the operatings systems i.e windows7 and ubuntu karmic 9.1 were working nicely.Today i created 2 more partition within the partition inside windows.Once I rebooted after creation of the new partitions my laptop is just showing a black screen with following message.
GRUB loading.
error: unknown filesystem
grub rescue>_
[code]....
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May 24, 2010
I just did a full installation of lucid erasing karmic. installation is completed but when I boot I get grub rescue. I also have WIN7 installed.
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Oct 24, 2010
First time poster and recent Ubuntu adopter. I recently installed 10.10 on my main HD alongside a separate windows (xp) partition (it worked perfectly). Then I decided to get fancy and installed 10.10 to a flash drive directly from a live cd. I attempted to boot from the flash drive, and got a black screen with a blinking underscore for about 10 minutes, then I forcefully rebooted. Now, whenever I attempt to boot at all from my main HD I get "error: no such device and a ton of misc numbers. And the flash drive will not allow me to boot from it. Currently, I'm working within the Live CD.
I have a few projects I need to complete with Dreamweaver inside XP, so recovering it completely would be nice.
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 #1 for (,msdos1)/boot/grub.
=> No boot loader is installed in the MBR of /dev/sdf
[Code].....
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Jan 17, 2011
I set up my Dell Inspiron Laptop as Dual Boot -> Xp / Ubuntu 10.04. - all worked well. I had 2 installations of XP on this machine and I removed one - all worked well. I then went into XP and deleted the partion (4) that the old XP had resided on (using Easeus Partition Master) All NOT working well !! Now when booting the machine I get grub rescue> I did ls and got ....
[Code]...
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Feb 2, 2011
I was dual-booting XP and Ubuntu 10.10 for a while, but as I never used Ubuntu it was just taking up space, so I figured I'd get rid of it. I used a partitioning tool from inside XP to remove the Ubuntu partition, forgetting that I used GRUB2 every time I booted to select which OS to load. Now when I start my computer I get stuck at the "grub rescue>" screen.After searching for solutions to this problem all of them said to either use the Windows XP CD to fix the Master Boot Record or reinstall Ubuntu, but I dont have my XP CD and there isnt enough room on my hard drive anymore for a Ubuntu install. Is there anything else I can do to fix this?
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Feb 5, 2009
I'm experimenting a bit with my fedora, so I need to enter rescue mode very often. Every time I want to enter rescue mode, I need to insert fedora DVD Is there a way to install rescue mode on my hard drive so I could boot into rescue mode from GRUB?
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Apr 9, 2011
I attempted to upgrade from 10.04 to 10.10. Upon restarting, I was presented this message:
Code:
error: the symbol 'grub_xputs' not found.
grub rescue>
I poked around the forums and found several posts that would probably be helpful but... I am unable to boot from a USB nor can I burn a Live CD as my other computer is a netbook. I made USB first boot in BIOS, but no luck.
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Feb 20, 2010
I accidently deleted my ubuntu partition, and when boot I get this message:GRUB loading.error:unknown filesystemgrub rescue>I can't get into my bios options either... I just see the MSI splash screen and it cuts right to this error message.
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Oct 11, 2010
Installed Ubuntu 10.04 a week ago or so (using wubi.)Tried to upgrade to 10.10 from within Ubuntu using the update manager.Now the PC will only boot to grub rescue.When booting, this is what i get:error: no such device: cd200414-0606-4d7d-8c08-004e9b5dc92d.grub rescue>Three commands work: ls, set and insmod.The ls command only yields: (hd0)(no partitions like (hd0,1), (hd0,5), etc.)
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Jun 17, 2011
I had 250gb hard disk with dual boot, xp and ubuntu 10.10.Yesterday, i tried to upgarde my ubuntu 10 to 11 from a live cd....b4 doing so, i used a win software EasyBCD to fix the mbr but it didn't work properly..and i ignored it(my biggest mistake)and deleted the ubuntu partion from the windows device manager. It just displays "Booting from Live CD" for few minutes and again displyas the same above error.What should i do now?Its ok if i m not able to recover my data back...i hv sycnd my docs on the internet.
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Feb 13, 2015
I'm inexperienced in Debian. I have a dual-boot machine (64-bit, Debian 7.3, Windows 7, legacy boot) and encouter a problem at boot ever since I completed the installation of Debian 7.3 alongside the exising Windows 7. This machine has six hard drives: two are intended for ntfs storage of general data (raided together by RAID1); two more are intended for ext4 storage of general data (also raided together by RAID1); the fifth contains the Windows OS files and the sixth contains the Debian OS files. The problem is that I arrive to the grub_rescue each time at boot, seeing the message:
GRUB loading.
Welcome to GRUB!
error: no such device: e081517b-3399-4067-9294-8f0686f753ca.
Entering rescue mode...
grub_rescue>
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Feb 11, 2010
I am fresh to Ubuntu and am having trouble getting it to boot on my system. I normally run XP, but recently added a second internal hard drive and installed Ubuntu on it. The installation went fine and upon initial reboot I received -
GRUB loading. error: no such disk grub rescue>
I am wondering if there is an issue between two different operating systems upon boot. I am not familiar with GRUB commands.
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Dec 23, 2010
I previously had a machine that dual booted Windows 7 and Ubuntu 10.10 32 bit. I recently attempted to wipe out the 32 bit Ubuntu and install 64 bit Ubuntu.
Here what I did:
- I booted from the LiveCD, and had no problems
- I formatted /sda3 using gparted. I checked that Ubuntu resided on /sda3 via the command "sudo fdisk -l". This worked fine.
- I then clicked the "install ubuntu" option on the desktop, and chose the largest chunk of free space.
- About 15% through the install, I was told the CD could not be read from due to a potential scratch or issue. I then tried to revert back to the Os running from the LiveCD, and things went crazy. I had trouble shutting down the machine and did a hard reset.
Now, whenever I boot I am greeted with the following message:
Windows Deployment Services: PXE boot aborted
error: no such partition
grub rescue>
At the grub rescue prompt when I ls, I see:
(hd0) (hd0,4) (hd0,2) (hd0,1)
I can still boot the LiveCD. I tried that again and tried to again format sda3 using gparted but had no luck fixing the issue. When booting from the LiveCD I am also told by gparted that "sda1 does not coincide with a cylinder boundary" or something of that nature.
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Jul 13, 2011
Downloaded Ubuntu 10.04.1 Desktop AMD64, tried to install it to a cleand HDD using the whole HDD, i.e. gave it permission to use the whole HDD. Installation process appeared to run OK but when it came to the restart it just fired up the message
error: out of disk
grub rescue>
I've searched this forum and found numerous references to these error messages but cannot make head nor tail of the diagnostic suggestions. Apart from anything else they suggest strings of command lines which I don't understand and can't enter anyway since they don't correspond to my keyboard layout (if I hit > or ) something completely different appears on the screen). Is there someone here who can provide a step-by-step solution in lay language ? Or is there such a thing as a bootable file which can be downloaded and inserted into my CD drive to correct this problem ?
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Sep 19, 2014
I am running a 14 disk RAID 6 on mdadm behind 2 LSI SAS2008's in JBOD mode (no HW raid) on Debian 7 in BIOS legacy mode.
Grub2 is dropping to a rescue shell complaining that "no such device" exists for "mduuid/b1c40379914e5d18dddb893b4dc5a28f".
Output from mdadm:
Code: Select all # mdadm -D /dev/md0
/dev/md0:
Version : 1.2
Creation Time : Wed Nov 7 17:06:02 2012
Raid Level : raid6
Array Size : 35160446976 (33531.62 GiB 36004.30 GB)
Used Dev Size : 2930037248 (2794.30 GiB 3000.36 GB)
Raid Devices : 14
[Code] ....
Output from blkid:
Code: Select all # blkid
/dev/md0: UUID="2c61b08d-cb1f-4c2c-8ce0-eaea15af32fb" TYPE="xfs"
/dev/md/0: UUID="2c61b08d-cb1f-4c2c-8ce0-eaea15af32fb" TYPE="xfs"
/dev/sdd2: UUID="b1c40379-914e-5d18-dddb-893b4dc5a28f" UUID_SUB="09a00673-c9c1-dc15-b792-f0226016a8a6" LABEL="media:0" TYPE="linux_raid_member"
[Code] ....
The UUID for md0 is `2c61b08d-cb1f-4c2c-8ce0-eaea15af32fb` so I do not understand why grub insists on looking for `b1c40379914e5d18dddb893b4dc5a28f`.
**Here is the output from `bootinfoscript` 0.61. This contains alot of detailed information, and I couldn't find anything wrong with any of it: [URL] .....
During the grub rescue an `ls` shows the member disks and also shows `(md/0)` but if I try an `ls (md/0)` I get an unknown disk error. Trying an `ls` on any member device results in unknown filesystem. The filesystem on the md0 is XFS, and I assume the unknown filesystem is normal if its trying to read an individual disk instead of md0.
I have come close to losing my mind over this, I've tried uninstalling and reinstalling grub numerous times, `update-initramfs -u -k all` numerous times, `update-grub` numerous times, `grub-install` numerous times to all member disks without error, etc.
I even tried manually editing `grub.cfg` to replace all instances of `mduuid/b1c40379914e5d18dddb893b4dc5a28f` with `(md/0)` and then re-install grub, but the exact same error of no such device mduuid/b1c40379914e5d18dddb893b4dc5a28f still happened.
[URL] ....
One thing I noticed is it is only showing half the disks. I am not sure if this matters or is important or not, but one theory would be because there are two LSI cards physically in the machine.
This last screenshot was shown after I specifically altered grub.cfg to replace all instances of `mduuid/b1c40379914e5d18dddb893b4dc5a28f` with `mduuid/2c61b08d-cb1f-4c2c-8ce0-eaea15af32fb` and then re-ran grub-install on all member drives. Where it is getting this old b1c* address I have no clue.
I even tried installing a SATA drive on /dev/sda, outside of the array, and installing grub on it and booting from it. Still, same identical error.
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Jan 18, 2011
I had Ubuntu installed, i installed Debian and there was no dual boot. So i formated all the hard disk to install only Debian. It installed but at boot i get error: no such device and the grub rescue> prompt. i googled for a solution and nothing worked:
- i tryed reinstalling grub, not worked
- i did the windows cd fixmbr trick, not worked
- reinstalled debian with fixmbr the first step and nothing
- tryed deleting with dd the mbr, not worked
- reinstalled grub from debian rescue, not worked
what should i do? i can't access my computer? please tell me how should i fix it? the google guys will kill me because i put their servers on fire
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Apr 11, 2010
First the hard data:
Upgraded from Ubuntu 9.04 to 9.10 via upgrade manager
System is AMD 64
Have dual boot with XP on seperate hard drive
[code]....
Then the wheelspin:
Seem to have knocked out GRUB as normal loading screen does not appear anymore.
Worse, I think I accidently installed grub to something labelled SDC5.
Cannot get anything except the "grub rescue" prompt. I'm not sure if using the LiveCD (9.10) can help. Have tried a few prompts from other threads but just ended up with mud splattered all over the place. I'm gathering I need to load grub, but can I do it using any grub rescue commands?
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Aug 4, 2010
Yesterday I made a thread about going back to Windows as I'm giving this laptop to a friend. Anyway, after I finally got Windows to re-install I'm now stuck with "grub rescue" instead of the OS booting. Is there anyone who knows a way I can get rid of grub rescue and get Windows to boot?
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Nov 26, 2010
I lost power during my Ubuntu update and when I powered back up ubuntu was broken. Now the stupid bit. My hdd was partitioned into 3 bits, vista os, data, and ubuntu. In vista I deleted the ubuntu part and merged it with the data part. Now when I power up my computer it goes straight to a black screen that says...
error : no such partition.
grub rescue> I have looked through the forums for an answer to my problem but to no avail. When I put the ubuntu live cd in and turn back on itjust goes to the same screen. I'm a novice to the world of computers and need any help you can offer.
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Feb 20, 2011
I installed Ubuntu server with software raid 5 and all went well. Then I figured I should test the raid by these instructions [URL] As a result mdadm would create /dev/md0 with 3 drives and 1 spare. Confused on this matter I just reinstalled Ubuntu. Now, I'm greeted with a grub rescue prompt at boot. Running set displays the correct parameters and ls (md0)/ shows the content of /. However, ls (md0)/boot/ shows no content what-so-ever. If I boot from the livecd there are all the files needed in /boot. I've tried running grub-install on all the drives without results.
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Apr 21, 2011
Month or so ago I ran into BusyBox, so while reinstalling Ubuntu 10.04 onto to that first FreeBox HD from a live CD, while manually adding & editing a new partition with free space to put Ubuntu into, I must have accidentally edited pre-existing partitions possibly deleting everything off of that HD. After reinstalling, I went into the terminal & ended up trying to recover or restore the partitions that I thought were lost or deleted or struck sick (since it had BusyBox). But that broke it. Now, after breaking that first HD of mine, when booting, I run into the following at startup:
error: no such partition.
grub rescue>
Right now, I have that first HD as my slave HD I can no longer find this HD, I can't load into it. It might have died because it was making noises the last several weeks. But just yesterday when trying to get into this same first HD from Ubuntu, I'd receive this message:
Error mounting: mount: wrong fs type, bad option, bad superblock on /dev/sdb1,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so
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Feb 15, 2010
I had to format a partition of my NTFS hard drive using the Disk manager and the next time when I try to boot my computer I get a message Grub rescue.
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May 13, 2010
i have dual booted ubuntu with windows. but after a few days i realized that ubuntu was too slow for my system and then decided to uninstall it and planned on installing it later. So i deleted the partitions on which ubuntu was installed. I rebooted the system and the grub rescue promt appeared, i already knew the work around was to restore the windows MBR using the live cd i used to install ubuntu or the Windows installer. But the main problem is my DVD suddenly stopped working . So my question is, can i boot windows using the promt? is there any commands? or can i uninstall grub using the rescue promt?
My desktop has been down for more that two weeks
Ubuntu version: 10.04
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Jul 8, 2010
then my computer starts black window opens error: no such partition grub rescue>
[Code]....
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Sep 10, 2010
I just installed Ubuntu on a computer but it can't boot, it ends with a greb-rescue error.
What shall I do? Here's my fstab and my sudo blkid. I did an ubuntu side installation with xp.
Le FSTAB
# /etc/fstab: static file system information.
# Use 'blkid -o value -s UUID' to print the universally unique identifier for a device; this may be used with UUID= as a more robust way to name devices that works even if disks are added and removed. See fstab(5).
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc nodev,noexec,nosuid 0 0
# / was on /dev/sda5 during installation
UUID=3a307ad3-99a9-4301-8ad0-f601ef9d157c / ext4 errors=remount-ro 0 1
# swap was on /dev/sda6 during installation
UUID=5b3ff501-f07c-4c2e-ac2d-a238b599cbe2 none swap sw 0 0
/dev/fd0 /media/floppy0 auto rw,user,noauto,exec,utf8 0 0
SUDO BLKID:
/dev/sda1: LABEL="System" UUID="26AC3F75AC3F3E9D" TYPE="ntfs"
/dev/sda6: UUID="5b3ff501-f07c-4c2e-ac2d-a238b599cbe2" TYPE="swap"
/dev/loop0: TYPE="squashfs"
/dev/sda5: UUID="3a307ad3-99a9-4301-8ad0-f601ef9d157c" TYPE="ext4"
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Sep 30, 2010
I cant boot from my External HD with ubuntu installed.
I get this message:
error: file not found. grub rescue>
In an attempt to fix this problem, I tried using the following sudo command:
sudo mount /dev/sda5 /mnt
sda5 does not exist, I tried 4, then 3, then 2, and it worked, but that was a partition of my internal HD containing windows 7.
I also typed in:
sudo grub-install --root directory=/mnt /dev/sda
not I get the following error when I try to boot from my internal HD:
error: no such device: 57288a24-5d12-4fb1-b27e-eb09a1f9b7c6. grub rescue>
Is there a way to get grub to boot into windows 7 again?
When I type:
sudo fdisk -l
I receive a list of my drives and their partitions, This is my assumption as to what drive is
Which:
/dev/sda1 = Vista loader, for Windows 7
/dev/sda2 = Windows 7 (At least I hope its still there.)
/dev/sdb1 = Bootable Flash Drive.
/dev/sdc1 = External HD.
The text from the terminal is as follows:
Disk /dev/sda: 320.1 GB, 320072933376 bytes
255 heads, 63 sectors/track, 38913 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x8da4c52c
Device, Boot, Start, End, Blocks, Id, System.
/dev/sda1, 1, 1355, 10877952, 27, Unknown.
/dev/sda2 *, , 1355, 38914, 301961224, 7, HPFS/NTFS. (The commands changed this from FAT32)
Disk /dev/sda: 8054 MB, 8054636032 bytes
8 heads, 32 sectors/track, 61451 cylinders
Units = cylinders of 256 * 512 = 131072 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier:0x00000000
Device, Boot, Start, End, Blocks, Id, System.
/dev/sdb1, *, 1, 61452, 7865839+, b, W95 FAT32.
Disk /dev/sda: 250.1 GB, 250059350016 bytes
255 heads, 63 sectors/track, 30401 cylinders
Units = cylinders of 16065 * 512 =8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier:0x0000a613a
Device, Boot, Start, End, Blocks, Id, System.
/dev/sdc1, *, 1, 30402, 244197376, 83, Linux.
Eventually I would like to fix the error I get when I boot from the external, I would like to to boot to ubuntu, but for now I am concerned with getting my internal HD to boot windows 7. Where I originally found the terminal commands to begin with. I think sda5 is where linux was installed in the example I found, and didn't realize it.
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