[mdlug] Kernel upgrade problems

[Wojtak, Greg]

Unless you have another /boot partition, the root(hd0,0) should stay the
same.  This is the grub root, not the system root (/).  Try this entry:

title Red Hat Enterprise Linux AS (2.4.21-53.ELsmp)
        root (hd0,0)
        kernel /vmlinuz-2.4.21-53.ELsmp ro root=/dev/sda3
        initrd /initrd-2.4.21-53.ELsmp.img


Note the changes to the "root" line and the "kernel" line.

Greg


On 12/17/07 4:05 PM, "May, Mat" <MCMay at RGIS.com> wrote:

> I am running RHEL AS 3 Update 9 on Dell PowerEdge 2850s and I have just
> updated the kernel from 2.4.21-27.0.4.ELsmp to 2.4.21-53.ELsmp and when
> I reboot the server to use the new kernel I get the following error:
>  
>             VFS: Cannot open root device "LABEL=/" or 00:00
>             Please append a correct "root=" boot option
>             Kernel panic: VFS: Unable to mount root fs on 00:00
>  
> I then went into the grub.conf and changed the entry replacing the
> "LABEL=" with "/dev/sda3" which is my / partition and also changed the
> "root=" from 0:0 to 0:2.  After reboot I received the following error:
>  
>             Kmod: failed to exec /sbin/modprobe -s -k block-major-8,
> errno = 2
>             VFS: Cannot open root device "sda3" or 08:03
>             Please append a corrent "root=" boot option
>             Kernel panic: VFS: Unable to mount root fs on 08:30
>  
> Here are my grub.conf and device.map files.
>  
> Grub.conf
>  
> [root at dc1-21 grub]# more grub.conf
> # 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
> #          all kernel and initrd paths are relative to /boot/, eg.
> #          root (hd0,0)
> #          kernel /vmlinuz-version ro root=/dev/sda3
> #          initrd /initrd-version.img
> #boot=/dev/sda
> default=1
> timeout=10
> splashimage=(hd0,0)/grub/splash.xpm.gz
> title Red Hat Enterprise Linux AS (2.4.21-53.EL)
>         root (hd0,0)
>         kernel /vmlinuz-2.4.21-53.EL ro root=LABEL=/
>         initrd /initrd-2.4.21-53.EL.img
> title Red Hat Enterprise Linux AS (2.4.21-53.ELsmp)
>         root (hd0,2)
>         kernel /vmlinuz-2.4.21-53.ELsmp ro root=LABEL=/
>         initrd /initrd-2.4.21-53.ELsmp.img
> title Red Hat Enterprise Linux AS (2.4.21-27.0.4.EL)
>         root (hd0,0)
>         kernel /vmlinuz-2.4.21-27.0.4.EL ro root=LABEL=/
>         initrd /initrd-2.4.21-27.0.4.EL.img
> title Red Hat Enterprise Linux AS (2.4.21-27.0.4.ELsmp)
>         root (hd0,0)
>         kernel /vmlinuz-2.4.21-27.0.4.ELsmp ro root=LABEL=/
>         initrd /initrd-2.4.21-27.0.4.ELsmp.img
>  
> device.map
>  
> [root at dc1-21 grub]# more device.map
> # this device map was generated by anaconda
> (fd0)     /dev/fd0
> (hd0)     /dev/sda
>  
> I can boot into the older kernel version no problem, but I cannot figure
> out what to change to allow me to boot into the newer version.  Any help
> would be greatly appreciated.
>  
>  
> In a world without walls and fences, why do we need Windows and Gates?
> Mathew May
> RGIS LLC
> Inventory System Support
> mcmay at rgis.com
> (248)608-8244
>  
>  
> 
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