Debian Installation :: GRUB Unhelpful Rescue Mode After Updates

Jul 18, 2010

Today it happened again: After an apparently trivial update Grub (Grub2) enters rescue mode the next time booting, not displaying any useful help whatsoever at that point. (Remember that at boot time no manual or help pages are available.) I don't know what went wrong, but ... The harddisk or partition in question is now no longer a bootable partition.

I don't want to use much time trying to sort out things, so unless someone may direct me to at better procedure, I am going to save whatever can be saved from the hd and then reinstall debian (in this case: Sqeeze) from scratch. Nothing else has in my experience ever worked before.

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Ubuntu Installation :: Grub Rescue Mode - Error: Cannot Find A Device For /boot/grub (is /dev Mounted?)

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:


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Debian :: Reinstall Grub Or Get Rescue Mode From Netinst.iso?

Jun 18, 2010

I installed debian testing from hard disk using the netinst.iso. Now how can i get the rescue mode to reinstall grub? During installation i didn't get other options like rescue mode.It guided me to install debian testing from hard disk only.

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Ubuntu Installation :: Grub Not Go Further Than Rescue Mode

Jun 30, 2011

I installed Fedora on my pc over Ubuntu and now Grub wont go any further than rescue mode. (Apparently grubs boot folder was on the Ubuntu partition. Now I see why a dedicated boot partition is handy.) I used VMware to install Fedora as im currently out of CDs. VMware is setup to use the Physical HDD for the primary HDD in the VM. (I made sure VMware disabled access to the windows partitions so the guest couldn't access them.)

I am in Windows 7 at the moment and am avoiding rebooting as that will basically lock me out of the only computer I have access to. I tried running the Ubuntu LiveCD to restore grub but dont know how to mount Fedoras LVM partitions. What can I do to repair grub or at least install an MBR that is capable of booting windows? I can boot floppies and cds using VMware but am not sure what to use to fix this.

Fedora LiveCD wont mount any of the partitions to install Grub
Ubuntu LiveCD may work if I can mount the LVM partitions.

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Debian :: System Stuck On GRUB Message And Rescue Mode Not Worked

Jan 23, 2016

It happened when I updated my php5.4 to 5.5 version on my small Debian 7 server. I am only getting GRUB right after BIOS boot pass, then none of the keys working even C or Shift buttons to go to command promt except CTRL+ALT+DEL.

I have tried rescue mode with live CD, selected myserver/root/ partition to install GRUB but not worked.

How to recover my server, I have some important data in it and I don`t want to destroy them.

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Fedora Installation :: Boot Into Rescue Mode From GRUB?

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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Debian Configuration :: Grub Drops Into Rescue Mode - Error: File Not Found

Jul 20, 2010

I have a new installation. I try to boot and instead of my grub menu, I get "error: file not found" and am dropped into the rescue prompt. I have just a standard "Desktop" installation. I installed from the 5.05 net install cd. I installed grub to the MBR.

partitions are:
hd0,2 is /
hd0,5 is swap
entering the "set" command results in:

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Ubuntu Installation :: Computer Is Currently Stuck In "Grub Rescue Mode"

Apr 28, 2011

my computer is currently stuck in "Grub Rescue mode" I don't know how to get it unlocked. I tried installing the latest ubuntu from wubi after I deleted the partition for 11.04 beta I had already had (I had some issues with 11.04 so I went to windows (it's a dual boot machine) and cleared the partition) After I got rid of ubuntu from there I don't think it automaticlly got rid of grub, which I was unaware of. So I continued to go through Wubi for to install 11.04 side by side Windows and to be used with the windows loader.

After I got thorugh all of that stuff I was instructed to restart my computer (as usual) and I did. But as soon as my computer came back on it came into "grub rescue>" with the error message at the very top of the screen "error: no such partition." I am currently using a different PC to type this. I would like to know how to get out of the rescue loader and at least back into windows (I have windows 7). I don't care to much if I can make it into Ubuntu as I have most of my more important files on Windows. I'm kinda scared atm, because I read somewhere earlier that I can't really do anything unless I have the windows boot disc, which I don't.

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Ubuntu :: Grub Rescue Mode Won't Go Away

Dec 7, 2010

I have an Ubuntu 10.4 installation (dualboot with windows XP) with grub2.After I resized some of my partitions using a gparted live cd, the system goes directly to grub rescue mode every time I boot.Then I follow the instructions which are given in grub2 wiki site to boot.The grub boot directory is now located in sda6 (hd0,6) in my system as found out using 'ls' command.

But in the grub rescue mode when I enter the 'set' command (one of the very few commands available), to display current prefix and root, it gives "(hd0,7)/boot/grub" as 'prefix' and "hd0,7" as 'root'.After entering the following commands, I'm able to boot.There are other users at my home not familiar with ubuntu. windows is their OS of choice. So I don't want to remove windows installation .One solution that I can think of is creating a grub rescue CD using grub-mkrescue, then using windows cd to fix mbr (which will overwrite grub? or the pointer to grub?) and then using the grub rescue cd to boot into Ubuntu but I'm not sure.

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General :: Fixing Grub From Rescue Mode

Feb 23, 2011

I got my wife to try Linux, so we set her machine up to dual boot with Windows. After a few weeks, she decided not to use Linux, so we deleted the Linux partitions using Gparted on a USB drive and resized the NTFS partition, under the apparently mistaken impression that Grub would detect that there was now no other operating system. When we rebooted, we got error: no such partition, followed by a grub rescue prompt. I've never worked with Grub directly before, so I have no idea what to do at this point.

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Debian Installation :: Reinstalling From Grub Rescue

Feb 19, 2015

I have a virtual Linux server and i deleted his boot partition by mistake. Now When i try to enter the machine I see

Select allfilesystem unknown
Grub rescue >

I was told i need to reinstall the server so I've downloaded the ISO files i need.

I've connected the ISO to the machine but i don't know what yo do next.

I've read online that i need to do ls and find where the ISO is so i can boot from it.

But i get error unknown filesystem for everything so i don't know what to do?

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Debian Installation :: Dual-boot Grub Rescue Says No Such Device

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...

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Debian Installation :: Grub Rescue - Will Not Boot From Mdadm RAID - No Such Disk

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
            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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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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Debian Installation :: No Dual Boot - Error: No Such Device And The Grub Rescue> Prompt

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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Debian :: Unable To Get Into Rescue Mode

Jun 1, 2015

I have a brand new Z97-PRO (Wifi/USB3.1 version) that I got to replace a Gryphon Z87, and it was working great for the first day. I had my Debian and Windows drives both working, and I was working on getting GRUB reinstalled on the Debian drive in no time. At some point I needed to restore my Windows MBR for the millionth time, but this time was different. The Windows logo popped up and froze there. I know this is a thing that sometimes happens, but every other time since I replaced my Gryphon this process only lasted seconds. I let it sit for hours and it didn't move.

I then tried my Debian live USB, which loaded into the main menu, but upon selecting rescue mode it black screened and hung. This was an issue I experienced when I first got the board, but it seemed to work itself out after a few reboots and remained flawless until it just came back. At this point, I'm unable to get in to any of my OSes and I can't seem to successfully boot any external media in order to fix it. My BIOS is totally stock save for secure boot, which is set to Other OS, and memory in XMP mode. I also tried using an Ubuntu Live USB, but ended up hanging with the exact same Q-Codes as in Debian. I am running the system on 1 stick of RAM while testing.

Q-Codes at hang:
UEFI USB - AF (Exit Boot Services Event)
Regular USB - F6 (Reserved for future AMI progress codes)

- 2 boot SSDs (OCZ for Windows, Kingston for Debian), 2 storage drives, and a DVD drive.
- The boot SSDs occupy SATA ports 1 & 2, the DVD drive takes up 3, and the storage drives take up 5 & 6
- i7 4770K, 32GB (8GBx4) Corsair Dominator RAM, GTX780Ti
- 750W Silverstone PSU

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Debian :: Can't Connect At The Rescue Mode

Sep 2, 2010

i had a fully working system (debian /stable) but now i have a weird initrd error and i cant boot.

my boyfriend used to repair all the problems remotely (from the other side of the earth ) i have but now he cant connect at the rescue mode.

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Debian Hardware :: The Server Crashed And Now Only Able To Access It In Rescue Mode?

Jul 9, 2011

I have a linux (dedicated) server on 1and1. Last night, the server crashed and now I'm only able to access it in rescue mode.

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Debian Installation :: NVIDIA Quadro NVS 295 - Make Sure During Installation That GRUB Gets Configured To Stay In Character Mode Only?

Mar 2, 2011

I am trying to get Debian 6 to work on an hp Z400 - the problem is that it came with a NVIDIA Quadro NVS 295 graphics card; there may be a driver for Linux, but it doesn't matter, because GRUB insists on switching to some sort of graphics mode and the screen just blanks and switches itself off. Is there any way to make sure during installation that GRUB gets configured to stay in character mode only?

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Ubuntu Installation :: Load GRUB From Grub Rescue Prompts?

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


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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General :: Boot Into Rescue Mode Without Installation Media?

Jul 18, 2011

I've got CentOS 6 installed and am wondering if it's necessary to have installation media in order to run 'linux rescue'. (I have to do some LVM resizing and would rather do it from rescue mode than in a running system.)

What I've read about booting into linux rescue is that it seems to be necessary to have installation media and boot into that. But I'm wondering if it's possible to do it some other way, like from the grub menu? But it doesn't seem to be possible to enter 'linux rescue' from the grub command line (which I got to by typing 'c' in grub menu screen) - typing 'linux rescue' at grub command line says 'command not found'.

Maybe there's another way to do this? Or some fancy way to have loaded a rescue image or something onto my disk so I don't need installation media. There's 2 reasons why I'd like to enter linux rescue without installation media, both because my computer is very old. 1) My computer can't boot from USB, and 2) My CD/DVD tray is very unstable and keeps popping out intermittently, so I'd need to hold the tray in place during the whole LVM process and it's a real pain, and I wouldn't want to risk data corruption if the process is interrupted by my CD/DVD tray popping out.

I'm hoping there's some way - it'd also be nice to know how to do this if some urgent situation arose where I needed to enter linux rescue mode but didn't have installation media handy and it'd take to long to retrieve or create new installation media.

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Fedora Installation :: Use LiveCD To Boot Into Rescue Mode And Run Fsck?

Nov 22, 2010

Is it still possible to use LiveCD to boot into rescue mode and run fsck?

I just want to run fsck on my hard disk and make sure all is well.

Does fsck provide and logs or records of what it found?

Is it possible to run fsck without LiveCD?

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General :: Emergency Mode Can Mount HDD With FS Error / Not In Rescue Or Single User-mode

Dec 1, 2010

My linux workstation recently crashed. After rebooting, Linux (Red Hat 5.3) will not boot properly and automatically went into emergency mode or recovery mode i think. I can still see my /home/user/ and all the files inside.I boot from CD to rescue mode and tried mounting read-only the /dev/sd5 which contains the files in the crashed hard disk to try to copy out my files but mounting was unsuccessful (invalid argument). I checked the filesystem type using fsck -N /dev/sda5 and shows it to ext2. i tried to mount another known working hdd and was successful.

My question is why in emergency mode, the crashed hdd is able to be mounted automatically as read-only but cannot be done in rescue mode thru a bootable CD?Is there any special mount options used in emergency mode?I also cannot copy out in emergency mode booting from the crashed hard disk as everything is read only.

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Fedora Installation :: Mount NTFS Partition From 10 Rescue Mode/Disk?

Mar 9, 2009

Background for the problem:

A. I have partitioned my WinXP LTop into:

--- WinXP NTFS partition
--- a vfat partition (mounted onto /fat32)
--- Installed F10 on ext3 virtual partition

B. I do not want install grub-loader in the Master Boot Record (that would loose my WinXP boot-loader for ever)

C. I have installed grub boot loader in the First Boot Sector

D. Now I have to boot using Rescue Mode, do:

1. dd if=/dev/sda2 of=/fat32/linux.bin bs=512 count=1
2. mount -t ntfs /dev/sda1 /ntfs
3. cp /fat32/linux.bin /ntfs
4. modify /ntfs/c/boot.ini and introduce the statement 'c:linux.bin="Linux"'

Problem: Im not able to do step D.2 above.

** after booting linux using the Rescue Mode: sh-3.2# chroot /mnt/sysimage sh-3.2# uname -r sh-3.2# mount -f ntfs /dev/sda1 /ntfs FATAL: Could not load /lib/modules/ No such file or directory ntfs-3g-mount: fuse device is missing, try 'modprobe fuse' as root


* The rescue mode boots into i586 based kernel (I dont know what is the actual difference between i586 and i686 - will really appreciate if anyone can educate me about it). * The installation is only a i686 image and consequently there is *only* '/lib/modules/' dir and *no* other dir. There is no dir as xxxx.fc10.i586.

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Debian :: System Doesn't Boot Anymore - Grub Rescue

Feb 18, 2012

My system doesn't boot anymore, when I turn on the laptop, instead of the normal grub screen, i get the following:

"error: file not found
Entering rescue mode...
grub rescue> _"

I tried also to make a bootable usb w/ unetbootin but all the distros failed to load w/ a syslinux boot error message so I really need to fix the existing debian installation to get access to my files i need for the university, it's debian stable (6.0.4) on hp mini 210 ....

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Debian Multimedia :: Stuck At Grub Rescue When Remove Systemd

Jan 10, 2015

I thought I'd have a go at putting back sysvinit to run the start up daemons, after I discovered that upgrading to jessie removed it and slapped on systemd.

I didn't have any problems at all with systemd, infact it was pure speed at start-up, but after some reading I thought I'd like to go back to usual start-up scripts.

What I did was to boot a Live Debian and mount and chroot into my Debian system, then I ran

Code: Select allsudo apt-get remove --purge --auto-remove systemd
sudo apt-get install sysvinit-core sysvinit sysvinit-utils

On reboot, I hit a grub rescue prompt which says error: file not found.

Trying the methods to get that sorted out gets stuck with "unknown file system" after I use ls and ls(hd1,msdos2) -as well as other combinations - it only seems to work for a plugged in flash drive.

Then I chroot again and run update-grub and grub-install /dev/sdb but reboot still stops at grub rescue.

So I wonder, firstly, why replacing systemd mucked up grub. Then, besides re-install of systemd, how do I get a booting system?

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Ubuntu Installation :: Device Not Found, Grub Rescue, Post-Installation Error

May 19, 2010

I just (for the first time ever) installed a version of Ubuntu. It is 10.04. I installed off of the Live Disk. I was having a great time until the first time I went to boot into it and I got the message
"Error: No such device: "long number" Grub Rescue> "


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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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Ubuntu Installation :: Grub Rescue Won't Read From USB

Mar 19, 2011

I've tried reading other threads about grub rescue but it seems like it only works if the USB stick can actually be read. Sorry if I sound dumb, I'm really new to all of this.I installed Jolicloud (it's based off Ubuntu, apparently) to dual boot with Windows 7 which I got with my netbook. When I tried to get rid of Jolicloud, I think I accidentally deleted a partition-- now whenever I boot up my netbook, I get the black "grub rescue" screen of death.

I tried getting the netbook to boot from my USB but it won't do it. The USB light flashes but nothing happens. I know there's things in there because I can boot from the USB using my desktop. Jolicloud was initially installed from the USB so I don't know why it won't read it anymore.

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Ubuntu Installation :: GRUB-RESCUE On Upgrade From 10.10 To 11.04?

Apr 30, 2011

The day that the upgrade came out (not beta, the true release) I upgraded via the Update Manager. The upgrade went great until it asked me to reset to finalize. Upon doing that, I was greeted with a less than friendly grub-rescue> screen. The materials I currently have at my disposal are a 10.10 installation disc, and an 8.04 installation disc, and a rescatux disc (super grub) that seems to yield an error upon any of the four options presented... how can I use these (both have Live CD) to fix the grub...

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