CentOS 5 :: Unable To Mount Root?
Jul 30, 2010
Warning - Windows user who doesn't know much Linux outside of writing programs. Do feel free to patronise providing you explain in detail .
I have a working Windows XP machine. I've installed a second hard drive (channel 1, slave to Windows XP master) and installed Centos (having checksummed the images and verified the media). Problem is it will not boot.
The exact text on screen is...
Booting 'Centos (2.6.18-194.el5)'
root (hd1,0)
Filesystem type is ext2fs, partition type 0x83
kernel /vmlinuz-2.6.18-194.el5 ro root=/dev/VolGroup00/LogVol00 rhgb quiet
[Code]....
I've managed to use the "Linux rescue" to at least ensure the box default boots to Windows. how to get Centos to boot.
Also, given I told Centos where to install to, and I've not changed anything since, how come it could not even manage to create a working system? Never had this problem on Windows (OK, always on Windows 98 but I never considered that an O/S ).
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Jan 28, 2010
Environment: A 32-bit kernel RHEL5.3 system running on a virtual machine. The root(/) filesystem is on an LV.
Issue: Unable to resize the FS after extending the root LV since it is mounted. After extending the LV, online resizing of the FS was not supported and the root filesystem could not be unmounted while it was in use. On rebooting, I got a kernel panic error. In runlevel 1, I couldn't run chroot, couldn't find the /etc/fstab, root FS could not be mounted, fsck did not run (tried block 31 for second copy of superblock using dd count=1 bs=4k skip=31 seek=1 if=/dev/sda2 of=/dev/sda2), couldn't find any rpm on installation media to install unix-utils rpm. On running commands in runlevel 1,
I got the following output.
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Apr 15, 2011
got a client which rebooted one of their slackware servers and would not come up.Server is stuck at Kernel panic - not syncing: VFS: unable to mount root FS.I have booted into a live cd and mounted hdd1 but have not been able to get any further.
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Jan 7, 2010
My computer developed a new trick tonight. 4 times in the last 2 hours it's booted & ran fine...for about 30 minutes or so. Then some apps become unstable & crash, and some don't notice anything wrong. Firefox keeps running fine, but if I have a nautilus window open, the next time you click anywhere, it crashes. So, try to restart the machine & it comes back with the "kernel panic -not syncing vfs unable to mount root FS on unknown block" message. The first time I restarted it, I managed to get to a root terminal & fsck the drive. It found 2 errors that it fixed, supposedly. The next collection of restarts, it would just go through bios, then grub, then hang on the error.
So, power down the machine first & then boot it....magically, I'm back to the desktop again for another 30-45 minutes. Anyone have any idea what's going on? It's been fine since the day mint was released...and the only system change was plugging my 2nd monitor back in 3 days ago. Why would it go kukoo in the last 2 hours?The machine is a quad core intel with 4 gigs of ram, Asus mobo and a 250gig sata drive for the system drive.
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Mar 26, 2010
somehow got Ubuntu 9.10 set up dual boot on my Vista laptop. I installed it somehow off the live cd. Everything working fine and then I decided to update from the update manger to Ubuntu 10.04 (dummy me)!
Got half way through installation and system froze for more than an hour. Had to shut down computer. Now when I select to boot to Ubuntu, computer freezes with this message:
[ 1.068088] Kernel panic - not syncing: VFS: unable to mount root fs on unknown-block(8,1)
Can anything, within reason, be done? Should I use windows to uninstall Ubuntu and then try to re-install? If so, can someone tell me how I might have setup dual boot off the live cd? Should I just flog myself?
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Mar 3, 2011
I can't mount my Ubuntu partition. I was using my PC when it suddenly crashed, so I rebooted. When Ubuntu started again, it said that it was mounting, but I rebooted again. So, now when I start it tries to mount the main partition but it can't. Then appears <initramfs> and I don't know what to do.
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May 11, 2011
Was using 10.04 and decided to upgrade to 10.10 with a view to upgrading to 11.04. No dice.
That was a few days ago so forget about that bit, no traces of 10.04 left now...
Downloaded the LiveCD version of 11.04 (twice, in case it was a faulty image) and install.
Every time I boot I get the "unable to mount root fs on unknown block (0,0)" error - no matter what I do.
I've tried reinstalling the system totally from the CD a number of times...
Tried purging and reinstalling Grub2...
Tried messing about with the grub bootloader settings...
And much more besides!
The system will boot perfectly off the LiveCD, which indicates to me that the 'system' is compatible with the computer?
I've done most of the things that a simple Google search on these forums suggests, with reinstalls in between but still can't get the PC to boot.
I have got and run the boot info script, although I'm in the middle of a complete reinstall AGAIN so will post the new version when it's done.
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May 27, 2011
I am using GRUB bootloader. I can boot into windows fine. But booting into linux gives me the error "kernel panic: unable to mount root fs on unknown block(0,0)I got LILO to load linux fine but GRUB always gives me this error regardless of the linux OS for this particular computer.
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Jun 23, 2010
I am trying to install RHEL 4 AS update 4, bootin from sata CD drive it is giving error Kernal panic-not syncing VFS- unable to mount root fs on unknown-block (9,1)
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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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Apr 6, 2010
I installed a update on a driver now i cant boot ubuntu. i select ubuntu,then ubuntu generic then i get this message. [ 1.772486] Kernel Panic -Not syncing :VFS: Unable to mount root FS on unknown Block (8,1)
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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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Nov 23, 2010
i bought following server about some days ago :Supermicro X8DTi1u Super micro
2x 1TB Sata 2 i want install centos 5.5 64bit on it, i download centos 5.5 64bit from centos.org torrent link but when i want setup centos it says :kernel panic : not syncing : VFS: unable to mount root fs on unknown block(253,3)and also i set adptec raid in my bios and set raid 0 in adptec raid controller (my mainboard has onboard raid) i run any command you think like linux dd, linux all-generic-ide, linux noprobe, linux nostorage and etc but none of them does not work for ,e
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Jan 13, 2010
When I boot up for Ubuntu 9.10, I get a screen that gives me a selection of what I assume are versions of Ubuntu 9.10.I get: Kernal Panic: not syncing: VFS: Unable to mount root fs on unknown-block(8,3) and the process stops. I have to turn off the computer and go back and select "2.6.31-15 generic"What is going on and what do I need to do to get back to 17 generic version?
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Jan 30, 2011
I have a wind river linux installed on a IDE disk, whenever i boot it, it says:
The menu.lst file looks like this:
I want to install new kernel of wind river linux, i tried to mount usb disk but it is not working.
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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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Jun 27, 2009
I have successful tar an existing CentOS 5.2 partition from Fefora10. The idea is to move a working CentOS 5.2 reside in an internal hard drive to a portable hard drive. I know how to edit a stencil in menu.lst to boot the clone CentOS5.2. During boot, I encountered
Red Hat nash version 5.1.19.6
mount: could not find filesystem /dev/root
setuproot: moving /dev failed No such file or directory
setuproot: mounting /proc: No such file or directory
setuproot: mounting /sys: No such file or directory
[Code]...
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Nov 21, 2009
Quote:
I've upgraded to fedora12 from fedora11 using preupgrade.
The process was successfull till the first boot, where I got above error message.
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Aug 31, 2010
I had to change the mounting properties of my disk partitions so i tinkered with the fstab file.. Now I am unable to mount the cdrom as a normal user..To mount the cdrom I had to login as root in terminal and use the following command:
Code:
mount /mnt/cdrom
The cdrom entry in my fstab file reads:
[code]...
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Feb 1, 2010
Yesterday after new update I got Kernel panic - not syncing: VFS: Unable to mount root fs on unknown - block (8,2)
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May 25, 2010
I wanted to try out the new Ubuntu 10.04, but since I don't have any CD's available I thought I could use my 9.10 CD and upgrade from it.
1. Installed 9.10 on the entire disk.
2. Went to update manager(?) and clicked the button to upgrade to 10.04
3. It successfully downloaded all the files.
4. When installing the new files it suddenly said that it failed to update, and it stopped. Then I went to do a hardware test, but none of the menus were working.
I had to do a manual shutdown, and reboot the computer. This time I was met with an error "Unable to mount root fs".
I figured the upgrade was the problem, so I reinstalled 9.10 to try without upgrading.
1. Reinstalled 9.10 on the entire disk.
2. Went to update manager(?) and started the normal update for 9.10 so the system would be up-to-date.
3. Same thing happened now, it fails to update and it makes my computer useless.
I've already checked my hardware for errors, can't find any. I've checked the CD for errors, can't find any. I had 9.04 on the same computer a few weeks ago, and it was rock-solid. Worked like a dream. I'm using Win7 now though.
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Aug 11, 2010
I have compiled a new kernel 2.6.35 and I can not boot because same error : kernel panic - Unable to mount root fs on unknown-block(0,0). i have motherboard ga-p55a-ud3r and controlleris sata .now i use channel in ACHI mode. when i change it in ide mode it boots but in low graphic mode. then i have compiled modules again with support ACHI_SATA mdoe in xconfig of kernel. but same error occur.
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Jan 24, 2011
I bought SuSE 8.0 professional a long time ago, while living in Germany. I have an old German laptop that currently has Win2K installed, and I would now like to replace Windows with Linux on it. The computer boots the initial CD fine and gives me a number of installation choices. If I do not add a "root=/dev/hda1" to the parameters it stops the installation with a "Kernel panic: VFS: Unable to mount root fs on 08:01" and if that line is there the error message changes to 03:01.
Is this because the hard drive is already formatted to NTFS? Is there a way to delete the partition and create a new one from the Linux installation disks?
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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. ś Yes I've still got my third level key and everything.
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Jan 28, 2011
i am getting the error msg as follows when i run my own kernel ,kernel panic - no syncing unable to mount root fs on unknown-blockit my pc info :ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.15, strippedWhat does this mean
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Jul 30, 2011
I used make-kpkg to generate bzImage from 2.6.39-3-686. After update-grub and booting the new vmlinuz system. I get:
"kernel panic - not syncing:
VFS: unable to mount root fs on unknown block(0,0)".
grub.cfg shows new entry
'linux/boot/vmlinuz-2.6.39.3-686 root=/dev/sda1 ro quiet'
but previous working shows
'linux/boot/vmlinuz-2.6.32-5-686 root=UUID=210a363d-c0ed-4005-b6e8-bbc
aeb7abe54 ro quiet'
Am I missing a step? (or two?). Is it possible to do this from 2.6.32? Currently running Debian-6.0.2.1-i386-DVD-1, Squeeze, /release/current/ 20110626-15:45 on a SATA 1T hd.
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Mar 25, 2010
I am having problems with an old laptop I have. It had windows xp on it, and after loaning it to a friend it wouldn't boot up. I decided to try linux, but I'm having problems loading it. If I try to run the liveCD it halts because its unable to mount root. If I try to install it just doesnt work well (will stop at different points).
So I figured a mem test would help. I am running the test, currently its on test #6, but it is coming up with a ton of errors. Does this mean I need to replace the RAM?
If so, this is the computer I have. Will this RAM work? I've been out of the tech game for awhile so not really following hardware anymore, and just want to double check.
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Apr 14, 2010
Code...
whats wrong with it? 'man mount' says that any can mount partition if it contains option 'user' or 'users' in /etc/fstab ?
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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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