Debian Configuration :: Kernel Panic: Cannot Open Root Device
Jun 7, 2010
I am using a kernel with no initrd. I have had this kind of panic before. Usually it means that the kernel can access the hard drive because the driver for the controller or filesystem isn't built into the kernel.
The kernel is 2.6.34 vanilla.
My IDE controller is a Silicon Integrated Systems SiS 5513, and I built the driver for it into the kernel BLK_DEV_SIS5513=y
My /boot (hda1) is ext2, and everything else is ext3
EXT2_FS=y
EXT3_FS=y
My grub entry (hda2 is my root partition) kernel (hd0,0)/vmlinuz root=/dev/hda2
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Apr 24, 2011
I am trying to install Ubuntu 10.10 from a USB flash memory stick. It works fine until around 95%, where I get the following warning/error:
[Code]....
I click OK and the installer seems to finish nicely, except the terminal throws several errors along these lines (see photo):
[Code]....
I tried also with 10.04 LTS, the difference being that the install warning appears two or three times instead of once. Some results from googling (Ubuntu Forums, Ubiquity bug) suggest unchecking the initial update options. I am going to try this but I'm not sure if I'll be able to get the boot loader right (there seemed to be problems with this).
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Nov 2, 2015
I have a system that was upgraded from Debian 7 to 8. Unfortunately it is not able to boot from the new kernel 3.16. Only the old 3.2 kernel is able to boot. I could transfer a backup, install it in Virtualbox, redo the upgrade and I can reproduce the error..The last error before "panic" is this line
Code: Select all 59.073579] Freeing unused kernel memory: 216K (ffff8800017ca000 - ffff880001800000)
Loading, please wait...
[Â Â 59.226154] systemd-udevd[53]: starting version 215
[Â Â 59.326564] random: systemd-udevd urandom read with 4 bits of entropy available
Begin: Loading essential drivers ... done.
Begin: Running /scripts/init-premount ... /init: .: line 210: can't open '/scripts/init-premount/ORDER'
[Â Â 59.552148] Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000200
The directory is indeed empty. I have reinstalled
Code: Select allapt-get install -reinstall initramfs-tools
and rerun initramfs
Code: Select allupdate-initramfs -c -u
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Feb 19, 2016
I recently tried to install php5-gd package on my debian vmware server and it failed at libc6 - i386.
Afterwards every command other than CD caused a Segmentation fault and the server would no long boot, showing the following error
[ 4.808086] init[1]: segfault at 0 ip (null) sp bff4645c error 14 in init[8048000+8000]
[ 4.808372] Kernel panic - not syncing: Attempted to kill init!
[ 4.808442] Pid: 1, comm: init Not tainted 3.2.0-4-686-pae #1 Debian 3.2.65-1
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May 30, 2011
i immigrate to Debian Squeeze. So, for each time i want to start debian i have a kernel panic and ( mouse + keyboard blocked ), I can't use anything.Here is my kern.log pastebin
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Jul 13, 2011
I am currently having issues with system freeze when unmounting portable hard drives. This happens almost every single time. Normal USB sticks are fine and do not produce the freeze. I am using kernel 3.0.0-rc6, however the issue also persists when switching back to 2.6.39. This is the error message i get when freeze occurs, reverting to terminal output:
WARNING! power/level is deprecated use power/control instead
Jul 13 18:26:49 destiny kernel: [ 6196.892776] Call Trace:
Jul 13 18:26:49 destiny kernel: [ 6196.892803] [<ffffffffa008feec>] ? scsi_setup_blk_pc_cmnd+0x15/0x104 [scsi_mod]
[Code]...
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Aug 21, 2011
I am running Debian squeeze. A while ago I upgraded my kernel to 2.6.38 from backports. Just now I thought it would be good to upgrade to 2.6.39 from backports. Upgrade went fine, but after rebooting I get a kernel panics rightaway.
"No filesystem could mount root, tried:"
"Kernel panics = not syncing: VFA: Unable to mount root fs on unkown-block(0,0)."
This is the first time one of Linux installations halts/panics on booting, so I don't know what to do now. I tried booting the recovery entry from the grub boot menu, but same result.
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May 17, 2010
I have attempted to install kernel 2.6.34 and 2.6.33 kernels with this Debian howto [url] Everything worked without any errors until I went to boot into the new kernel. When I receive this kernel panic output Kernel panic - not syncing VFS: unable to mount root fs on unknown-block(0,0)
It also spits out something about being unable to access ext2 FS. I googled this symptom and have seen that it is fairly common, but everyone's error seems somewhat unrelated. I used the same kernel configuration as the one that is currently working, to keep things simple.
And here is what my menu.list looks like:
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Oct 4, 2010
I am trying to install debian on my windows PC but am receiving some errors with it. I have downloaded "debian-506-amd64-DVD-1.iso" from debian website and am seeing that the md5 sum is correct. I am getting following error when I choose Graphical Install or install.
[ 1.480788] crc error
[ 1.569788] kernel panic -not syncing:VFS: Unable to mount root fs on unknown block(253, 52)
Description of my PC: I have 2 hard disks
1. IDE hard disk (80 GB) -> windows is on this drive
2. SATA hard disk(250GB) -> I intend to install debian on this drive.
3. MSI motherboard & AMD 64 processor with 1 GB RAM.
4. NVidia external graphics card based on AGP slot(256 MB)
EDIT:: This time I got one more error message prior to the 2 shown above [some number] PCI:Cannot allocate resource region 0 of device 0000:00:00.0
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Feb 2, 2010
I recently (a couple weeks ago) installed Ubuntu on my desktop computer dual booting with Win XP (which I am using right now). I used Wubi to install it, and everything went fine. I used Ubuntu without a problem up until a few days ago. I am using an install of Ubuntu (I am not running it off a disc, USB drive or through the Wubi software).
I restarted my computer after using Ubuntu constantly for the time I've had it installed. It booted into Win XP (because it was first on the list where you select which OS to load) so I restarted again and tried to boot into Ubuntu. Instead of working, it gave me the error "Kernel panic - not syncing: unable to mount root" or something like that. So, I restarted again, and it was the same thing. I restarted in recovery mode, and it was the same thing.
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May 3, 2010
Fresh install on an acer.CRC=3691807100boots livecd fine selected to replace entire disk now presented with vfs error after install and reboot. This is a full replace install taking all the disk not a wubi install. Please help I don't want to have to reinstall windows 7 (PC has worked sweet as for 4 weeks with windows 7 just need to get back to ubuntu again
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May 5, 2011
I have just tried to update my kernel from 2.6.24.5 to 2.6.39-rc3 on a Slackware 12.1 distribution. I have successfully updated the kernel before, but it was from a newer distribution and newer kernel(Slackware 13.1 and 2.6.33.4). After I updated and rebooted, I got the following error:
Code:
List of all partitions:
0300 4194302 hda driver: ide-cdrom
0800 312571224 sda driver: sd
0801 244197560 sda1 00000000-0000-0000-0000-000000000sda1
0802 68372640 sda2 00000000-0000-0000-0000-000000000sda2
No filesystem could mount root, tried: romfs
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block (8,1)
Pid: 1, comm: swapper Not tainted 2.6.39-rc3-smp #1 .....
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Apr 19, 2011
I have been dual booting "Windoz" (hda1) and slackware 11 (RTAI - hda 5) old system. The problem happen after I installed slackware 13(sda8) on the same hard drive. I was able to mount my old slack11 (now (sda5)) to slack13 to read. So I wanted to boot to slack11.
MY Lilo on slack 13:
Now when I boot to Slackware11 I get:
VFS:
How can I boot a old "hda" image on "sda" system. With a floppy I can go back to Slackware11.
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Oct 4, 2009
I have gone through all the kernel config options repeatedly, but everytime I get the same error after running my configured kernel.
To begin with, after unpacking the kernel I get Undefined video mode numer: 305 and then a selection of video modes appears.
Why are the standard settings in my lilo 1024x768x256 (vga 773) not accepted?
VFS: Cannot open root device "808" or unknown block(8,8) Please append a correct "root"=" boot option; here are the available partitions: Kernel panic- not syncing :VFS: Unable to mount root fs on unknown block(8,8)
My partitions are ext2, and this format (as well as other formats) are compiled in the kernel.
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Jul 26, 2010
I've just started using Linux Ubuntu. I had a frightening error message, I don't know why. But after browsing some replies to something similar on this site, I simply opened a previous session and found that all worked fine and I hadn't even lost any of my downloads and adaptations. Å› Yes I've still got my third level key and everything.
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Oct 29, 2009
I can cause the kernel to panic immediately with the following command. lvcreate --snapshot --name Snap --extents 100%FREE VolGroup00/LogVol00 The last line of the panic message is "<0>Kernel panic - not syncing: Fatal exception" If I create a snapshot of any other volume it works just fine. It only panics on LogVol00 which is my root fs.
I'm running 5.4 after update from 5.3. It didn't work with 5.3 either. This is a 32-bit guest running in VMWare Server 2.0.1 which is running on FC10 x86_64. I've tried the guest in both UP and SMP (2 cores) modes and observed no difference.
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Apr 29, 2010
Problems arose when I updated today, after not booting(updating) for a couple of days. Message originally said "Kernel panic - not syncing: UFS: Unable to mount root fs on unknown-block(8, 1)"
I get the options to boot too:
2.6.31-21-generic
2.6.31-21-generic(recovery mode)
2.6.31-20-generic
2.6.31-20-generic(recovery mode)
[Code].....
PS - I really don't want to sound like a jerk
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May 13, 2010
I had 9.10 installed on my IBM Lenovo Thinkpad, x301. I was performing updates as normal, and chose the Upgrade button to upgrade me to 10.04. Everything started fine, but upon reboot, no bueno, Kernel Panic!
The exact message was "Kernel Panic ubuntu - not synching VFS Unable to mount root fs".
I thought this was a grub issue. Since grub2 now is installed... But it was not. I think it ended up being a problem with some of my configuration files.
I have three kernels I tried:
1. 2.6.32-22
2. 2.6.31-21
3. 2.6.31-20
The first threw me into the kernel panic.
The second would hang on "init crypto disks"
The third would hang on "checking battery state"
I noticed (from reading another thread) that while these are loading up that you can click on alt-ctl-F1 thru F6 and get prompt. (I also had my home directory encrypted, thought that was part of the problem, but it wasnt).
Once I get passed the loging, I am able to poke around. I tried manually start Gnome via "sudo service gdm start", but it failed. Said it was missing a configuration file. Then I tried on "sudo dpkg-reconfigure gdm" and it would not work. Saying some configuration files are missing or broken. It also said something about dpkg --configure -a, I am assuming this configures everything...
So I tried "sudo dpkg --configure -a" And selected 'y' to every option. Which basically installs the package creators default settings, and viola! Works.
Just wanted to share that knowledge for the other stuck in the upgrade hell.
Normally I would just copy my files off and reinstall, but it was encrypted... Another headache. I guess good in case someone stole my laptop.
Remember try to "sudo dpkg --config -a"
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Jul 23, 2010
I just installed the DVD iso of Fedora 13...and did a "sudo yum update" after the installation got finished. After 3 hours of waiting, I restarted. I was greeted by Fedora with a kernel panic, right after it boots up.
Here's the message:
Code:
Kernel Panic - not syncing: VFS unable to mount root fs on unknown-block (0,0)
EDIT: Here's the content of grub.conf
Code:
# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE: You have a /boot partition. This means that
[code]....
What is peculiar on this grub.conf, is that the 2.6.33.6-147 boot conf is missing an initrd line...I looked in the /boot directory...and I found out that the initramfs file that matches the 2.6.33.3-147 kernel is also missing (i.e initramfs-2.6.33.3-147.fc13.i686.PAE.img).
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May 10, 2011
My Fedora 14 box is no longer starting. I am getting a message at startup - "Kernel panic - not syncing:
VFS: Unable to mount root fs on unknown-block(0,0)".
Unfortunately, I don't know what I did before I got the message. I mean, I have made various installations, including some kernel drivers (such as a wifi card and a sound card). Also I did need to update the kernel-devel package as a requirement for some install or other. I know that is not very helpful, but let's get to the important bit...
What does the message "Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)" mean? What has broken?
And how does on recover from it? I have been reading around, and of course I am able to boot the machine from a live CD, but I am not sure what I should do with grub.conf, what I should rebuild, how to do it and so on.
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Feb 2, 2010
I'm using Ubuntu 9.10 through Windows 7 and got this message today...
kernel panic- not syncing VFS: unable to mount root fs on unknown block (8,1)
Is there a way to fix this? (and I'm going to need really simple instructions here)
Also I tried to uninstall ubuntu in windows 7 and then reinstall but it will not let me. it says that an error has occurred: The system cannot find the file specified stdout=
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Feb 6, 2010
I was updating my Ubuntu 9.10 Karmic Koala when i decided that i should reboot my computer. All the downloads were done. When i rebooted it booted in normally but when it got into the kernel loading part, Linux-Bzimage and initrd loaded fine, But then Kernel Panic - not syncing : VFS: Unable to mount root as fs on unknown-block (8,1) came up. This is a wubi install also, and i have never had any troubles before.
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Mar 27, 2010
So, we had a power cut, and when I turned it back on, I got:
Quote:
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(8,2)
Hence, the computer won't boot.
Ubuntu is installed within windows.
I had so much data on there, How to without a re-install?
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May 19, 2010
[ 0.719079] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
I was installing updates on my Ubuntu 9.10 and one of them was the upgrade to the new 10.04 LTS. So I said, okay, great! Installed the updates, upgraded my Ubuntu (even though it informed me that some packages had errors). I restarted my PC and then I get this error. I don't know what happened, but that's the error I get when I turn my PC on. Nothing else happened.
PC Specs Compaq, 32-bit processor, 2GB ram, ATI Xpress 200 graphics, Realtek soundcard. PS/2 keyboard, USB mouse. SyncMaster 920Nx flat-panel monitor.
What I did to try to fix this, regardless of it not worked:I tried resetting the BIOS. Didn't do anything. I still get the error.Tried running from CD. It didn't detect the CD or anything, I guess, because I still get the error and it didn't let me run the CD.
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Dec 8, 2010
I screwed up trying to install a new kernel Now, when I try to boot up, it says: kernel panic not syncing VFS unable to mount root fs on unknown block My system:
-encrypted LVM with encrypted home
-10.04 ubuntu system
What's the easiest/fastest way recover the documents on my encrypted home folder? I have the home folder encryption passphrase. I just want to recover and backup those documents, even if after that I have to reinstall the whole system. I have a live CD and also another 10.04 system on a second computer. I've managed to mount the hard drive in this second system and see everything on it, except the contents of the user home folder (Private). Everything I see on the internet is about encrypted home, but not top of a LVM encrypted.
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Apr 20, 2011
I am currently running the latest version of Ubuntu (10.10 I believe) and recently installed a new, vanilla 2.6.37.1 kernel on my machine. Then, all I did was run update-grub (I'm not sure if this is correct as I am new to GRUB2 :/), rebooted and tried to boot into the new kernel, but I got the above error on boot. Does anyone know why this is happening?
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Dec 13, 2010
I have trawled through an extensive number of post on quite a few forums without even a step forward with this.
I have a fedora 13_x64 system with software raid1 for /boot and / (md0 and md1 respectively), swap is not raided.
I was doing an yum update through the software updater in gnome and the system froze.
I had to press reset to get any response from the machine.
Since then I have been getting the kernel panic above just after grub starts fedora.
I tried the previous kernel from the previous update and it has the same error.
At the worst I am prepared to load OS again but there is still some info and configs that I would like to access from the raid partitions before I go ahead.
Is there any way to access these partitions through a live CD or rescue environment?
Is there a method to bring this install back to life? or am I looking at a reinstall?
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Dec 13, 2010
I have trawled through an extensive number of post on quite a few forums without even a step forward with this.
I have a fedora 13_x64 system with software raid1 for /boot and / (md0 and md1 respectively) , swap is not raided.
I was doing an yum update through the software updater in gnome and the system froze.
I had to press reset to get any response from the machine.
Since then I have been getting the kernel panic above just after grub starts fedora.
I tried the previous kernel from the previous update and it has the same error.
At the worst I am prepared to load OS again but there is still some info and configs that I would like to access from the raid partitions before I go ahead. Is there any way to access these partitions through a live CD or rescue environment?
Is there a method to bring this install back to life? or am I looking at a reinstall?
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Jan 12, 2010
I have an ongoing issue that I've not been able to troubleshoot. Upon bootup I get the following text and error, and it stops. ACPI: Aborted because bad gzip magic numbers MP-BIOS bug: 8254 timer not connected to IO-APIC Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block (0,0)
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May 5, 2010
I recently started to use Ubuntu in VWware player on my windows-XP. I installed ubuntu 10.04 few days ago, It was working fine.
Yesterday, I compile a new kernel, kernel 2.6.33 in my vmware ubuntu 10.04. Everything went well till I did reboot. before reboot I use the command "update-grub" to make it compatible to the new kernel. BUT... after rebooting, I have a problem in loading a grub correctly. it gives me following message " [2.149136 ]kernel panic - not syncing: VFS: unable to mount root fs on unknown-block(0,0)" and I can not proceed further. I have my all data on it. I also tried to boot it from live CD but unfortunately, I can't mount the hard disk on it in order to get those data from my old Ubuntu set up.
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