Hi,
I am recovering a CentOS 5.4 system. I've copied all partitions into the recovery system. I've installed grub boot loader. However, the original system is using /dev/sdb1 for root (/), while the recovery system is using LVM (/dev/vg0/lv1) for root (/). When recovery system boots, I got the panic error:
* Mounting /dev/sdb1 on /sysroot
* Mount: mounting /dev/sdb1 on /sysroot failed: No such file or directory
* Mount: mounting /dev on /sysroot/dev failed: No such file or directory
* * switching / to /sysroot
* Switch_root: bad newroot /sysroot
* Kernel panic - not syncing: Attempted to kill init!
I've changed the recovery system fstab to use the correct devices. I deleted recovery system etc/lvm/cache/.cache file. But it still doesn't work. What am I missing?
Thanks,
- xinhuan
On Tue, Feb 8, 2011 at 1:51 PM, Xinhuan Zheng xzheng@christianbook.com wrote:
· * switching / to /sysroot
· Switch_root: bad newroot /sysroot
· Kernel panic – not syncing: Attempted to kill init!
I’ve changed the recovery system fstab to use the correct devices. I deleted recovery system etc/lvm/cache/.cache file. But it still doesn’t work. What am I missing?
What does your /etc/grub.conf look like?
Xinhuan Zheng wrote:
I am recovering a CentOS 5.4 system. I've copied all partitions into the recovery system. I've installed grub boot loader. However, the original system is using /dev/sdb1 for root (/), while the recovery system is using LVM (/dev/vg0/lv1) for root (/). When recovery system boots, I got the panic error:
Mounting /dev/sdb1 on /sysrootMount: mounting /dev/sdb1 on /sysroot failed: No such file ordirectory
<snip>
I've changed the recovery system fstab to use the correct devices. I deleted recovery system etc/lvm/cache/.cache file. But it still doesn't work. What am I missing?
What does your /boot/grub/grub.conf read? You have to edit that, then reinstall grub.
mark
2011/2/8 Xinhuan Zheng xzheng@christianbook.com
Hi,
I am recovering a CentOS 5.4 system. I’ve copied all partitions into the recovery system. I’ve installed grub boot loader. However, the original system is using /dev/sdb1 for root (/), while the recovery system is using LVM (/dev/vg0/lv1) for root (/). When recovery system boots, I got the panic error:
· Mounting /dev/sdb1 on /sysroot
· Mount: mounting /dev/sdb1 on /sysroot failed: No such file or directory
· Mount: mounting /dev on /sysroot/dev failed: No such file or directory
· * switching / to /sysroot
· Switch_root: bad newroot /sysroot
· Kernel panic – not syncing: Attempted to kill init!
I’ve changed the recovery system fstab to use the correct devices. I deleted recovery system etc/lvm/cache/.cache file. But it still doesn’t work. What am I missing?
Thanks,
xinhuan
try rebuilding initrd .
At Tue, 8 Feb 2011 13:51:32 -0500 CentOS mailing list centos@centos.org wrote:
Content-Class: urn:content-classes:message
Hi,
I am recovering a CentOS 5.4 system. I've copied all partitions into the recovery system. I've installed grub boot loader. However, the original system is using /dev/sdb1 for root (/), while the recovery system is using LVM (/dev/vg0/lv1) for root (/). When recovery system boots, I got the panic error:
Mounting /dev/sdb1 on /sysrootMount: mounting /dev/sdb1 on /sysroot failed: No such file ordirectory
Mount: mounting /dev on /sysroot/dev failed: No such file ordirectory
* switching / to /sysrootSwitch_root: bad newroot /sysrootKernel panic - not syncing: Attempted to kill init!I've changed the recovery system fstab to use the correct devices. I deleted recovery system etc/lvm/cache/.cache file. But it still doesn't work. What am I missing?
You need to rebuild the initrd and make sure the grub.conf file is up-to-date (has the right thing for the root parameter).
Thanks,
xinhuanMIME-Version: 1.0
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
My grub.conf is pointing to sdb1 for /. I've corrected to use /dev/vg0/lv1. But after rebooting, I am getting the same error. I guess I need to rebuild initrd.img file. How do I rebuild that file?
Thanks,
- xinhuan
-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of Robert Heller Sent: Tuesday, February 08, 2011 2:59 PM To: CentOS mailing list Cc: CentOS mailing list Subject: Re: [CentOS] mount the wrong device after system recovery
At Tue, 8 Feb 2011 13:51:32 -0500 CentOS mailing list centos@centos.org wrote:
Content-Class: urn:content-classes:message
Hi,
I am recovering a CentOS 5.4 system. I've copied all partitions into
the
recovery system. I've installed grub boot loader. However, the
original
system is using /dev/sdb1 for root (/), while the recovery system is using LVM (/dev/vg0/lv1) for root (/). When recovery system boots, I
got
the panic error:
Mounting /dev/sdb1 on /sysrootMount: mounting /dev/sdb1 on /sysroot failed: No such file
or
directory
Mount: mounting /dev on /sysroot/dev failed: No such file ordirectory
* switching / to /sysrootSwitch_root: bad newroot /sysrootKernel panic - not syncing: Attempted to kill init!I've changed the recovery system fstab to use the correct devices. I deleted recovery system etc/lvm/cache/.cache file. But it still
doesn't
work. What am I missing?
You need to rebuild the initrd and make sure the grub.conf file is up-to-date (has the right thing for the root parameter).
Thanks,
xinhuanMIME-Version: 1.0
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
On Tue, Feb 8, 2011 at 4:31 PM, Xinhuan Zheng xzheng@christianbook.com wrote:
My grub.conf is pointing to sdb1 for /. I've corrected to use /dev/vg0/lv1. But after rebooting, I am getting the same error. I guess I need to rebuild initrd.img file. How do I rebuild that file?
You'd use the mkinitrd utility and specify the name of the new initrd and the kernel version.
To create from the current settings:
Update your /etc/modprobe.conf mkinitrd /boot/my_new_initrd-`uname -r`.img `uname -r`
Then update your /etc/grub.conf and update the initrd line..
You can specify an alternate kernel than the one running also. This is useful if you're rebooting into a new kernel and need to preload the modules.
At Tue, 8 Feb 2011 16:31:32 -0500 CentOS mailing list centos@centos.org wrote:
My grub.conf is pointing to sdb1 for /. I've corrected to use /dev/vg0/lv1. But after rebooting, I am getting the same error. I guess I need to rebuild initrd.img file. How do I rebuild that file?
The best way to do it *right* is to boot with a rescue system (such as the installer CD/DVD). You need to make sure it properly mounts the necessary file systems, specificly /dev/vg0/lv1 as /sysroot, whatever you are using for /boot to /sysroot/boot (/boot can't be in the LVM volume group -- grub cannot deal with that!), then make sute /proc, /sys, and /dev are mount --bind'd to /sysroot/proc, /sysroot/sys, and /sysroot/dev. Then you will chroot to /sysroot and issue a command like:
mkinitrd -f /boot/initrd-2.6.18-194.32.1.el5.img 2.6.18-194.32.1.el5
(replace '2.6.18-194.32.1.el5' with the proper kernel version you will be booting from -- 2.6.18-194.32.1.el5 is the latest CentOS 5.5 kernel).
exit and reboot.
Thanks,
- xinhuan
-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of Robert Heller Sent: Tuesday, February 08, 2011 2:59 PM To: CentOS mailing list Cc: CentOS mailing list Subject: Re: [CentOS] mount the wrong device after system recovery
At Tue, 8 Feb 2011 13:51:32 -0500 CentOS mailing list centos@centos.org wrote:
Content-Class: urn:content-classes:message
Hi,
I am recovering a CentOS 5.4 system. I've copied all partitions into
the
recovery system. I've installed grub boot loader. However, the
original
system is using /dev/sdb1 for root (/), while the recovery system is using LVM (/dev/vg0/lv1) for root (/). When recovery system boots, I
got
the panic error:
Mounting /dev/sdb1 on /sysrootMount: mounting /dev/sdb1 on /sysroot failed: No such fileor
directory
Mount: mounting /dev on /sysroot/dev failed: No such file ordirectory
* switching / to /sysrootSwitch_root: bad newroot /sysrootKernel panic - not syncing: Attempted to kill init!I've changed the recovery system fstab to use the correct devices. I deleted recovery system etc/lvm/cache/.cache file. But it still
doesn't
work. What am I missing?
You need to rebuild the initrd and make sure the grub.conf file is up-to-date (has the right thing for the root parameter).
Thanks,
xinhuanMIME-Version: 1.0
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
The mkinitrd command worked out. Thanks a lot for your help. :)
- xinhuan
-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of Robert Heller Sent: Tuesday, February 08, 2011 4:47 PM To: CentOS mailing list Cc: CentOS mailing list Subject: Re: [CentOS] mount the wrong device after system recovery
At Tue, 8 Feb 2011 16:31:32 -0500 CentOS mailing list centos@centos.org wrote:
My grub.conf is pointing to sdb1 for /. I've corrected to use /dev/vg0/lv1. But after rebooting, I am getting the same error. I
guess
I need to rebuild initrd.img file. How do I rebuild that file?
The best way to do it *right* is to boot with a rescue system (such as the installer CD/DVD). You need to make sure it properly mounts the necessary file systems, specificly /dev/vg0/lv1 as /sysroot, whatever you are using for /boot to /sysroot/boot (/boot can't be in the LVM volume group -- grub cannot deal with that!), then make sute /proc, /sys, and /dev are mount --bind'd to /sysroot/proc, /sysroot/sys, and /sysroot/dev. Then you will chroot to /sysroot and issue a command like:
mkinitrd -f /boot/initrd-2.6.18-194.32.1.el5.img 2.6.18-194.32.1.el5
(replace '2.6.18-194.32.1.el5' with the proper kernel version you will be booting from -- 2.6.18-194.32.1.el5 is the latest CentOS 5.5 kernel).
exit and reboot.
Thanks,
- xinhuan
-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of Robert Heller Sent: Tuesday, February 08, 2011 2:59 PM To: CentOS mailing list Cc: CentOS mailing list Subject: Re: [CentOS] mount the wrong device after system recovery
At Tue, 8 Feb 2011 13:51:32 -0500 CentOS mailing list centos@centos.org wrote:
Content-Class: urn:content-classes:message
Hi,
I am recovering a CentOS 5.4 system. I've copied all partitions into
the
recovery system. I've installed grub boot loader. However, the
original
system is using /dev/sdb1 for root (/), while the recovery system is using LVM (/dev/vg0/lv1) for root (/). When recovery system boots, I
got
the panic error:
Mounting /dev/sdb1 on /sysrootMount: mounting /dev/sdb1 on /sysroot failed: No such fileor
directory
Mount: mounting /dev on /sysroot/dev failed: No such file
or
directory
* switching / to /sysrootSwitch_root: bad newroot /sysrootKernel panic - not syncing: Attempted to kill init!I've changed the recovery system fstab to use the correct devices. I deleted recovery system etc/lvm/cache/.cache file. But it still
doesn't
work. What am I missing?
You need to rebuild the initrd and make sure the grub.conf file is up-to-date (has the right thing for the root parameter).
Thanks,
xinhuanMIME-Version: 1.0
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
-
cornel panceac -
Kwan Lowe -
m.roth＠5-cent.us -
Robert Heller -
Xinhuan Zheng