CentOS - Feb 2011 - mount the wrong device after system recovery

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

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On Tue, Feb 8, 2011 at 1:51 PM, Xinhuan Zheng <xzheng at
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 /sysroot
> *         Mount: mounting /dev/sdb1 on /sysroot failed: No such file or
> directory
<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 at 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 .
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At Tue, 8 Feb 2011 13:51:32 -0500 CentOS mailing list <centos at
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 /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?
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,
> 
>  
> 
> -          xinhuan
> 
> MIME-Version: 1.0
> 
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> 
>                                                            
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