UPDATE: Copying one HardDisk to another HardDisk

I just want to add more information on this issue:

- The /etc/fstab does not have the "LABEL=/" label, I replaced it with /dev/sdx 
before mounting the 2nd Disk. So both Disks have /dev/sdx.
- This time, the 1st and 2nd Disk geometries are the same. But it would be great 
if this can be done even if the 2nd has a different size.
- I am writing a shell script to accomplish all this, it would be great if I 
don't have to do any manuall work like boot in a rescue mode then install grub 
from a CD. 
- I still get the "kernal panic" message. This is driving me crazy.

I received some suggestions, all were great but unfortunately none worked.

Thank you all for participating, I will summarize 

> Hi,
> 
> I have a problem making a 2nd HardDisk bootable after copying it from 1st Disk
> 
> - This is done on a RedHat WS release 3, 2.4.21-4.EL
> - We do not want to use "dd" to accomplish this task
> - The 2nd disk needs to be bootable
> - What we need to accomplish is to be able to boot on the 2nd Disk after 
moving 
> it to the first slot.
> 
> 
> Here are the steps am taking:
> 
> 1. partition 2nd Disk
> 2. mkfs -t ext2 /dev/sdb1
>    mkfs -t ext2 /dev/sdb2
>    mkfs -t ext2 /dev/sdb5
>    mkswap /dev/sdb3
>    
> 3. mount /dev/sdb1 /mnt/sdb1
>    mount /dev/sdb2 /mnt/sdb2
>    mount /dev/sdb5 /mnt/sdb5
>  
> 4. cd /mnt/sdb1; dump 0f - /dev/sda1 | restore rf -
>    cd /mnt/sdb2; dump 0f - /dev/sda2 | restore rf -
>    cd /mnt/sdb5; dump 0f - /dev/sda5 | restore rf -
>    
>    I even tried the following:
>    
>    rsync -axvPS /boot/ /mnt/sdb1
>    rsync -axvPS //     /mnt/sdb2
>    rsync -axvPS /var/  /mnt/sdb5
>    
> 5. If I reboot on the 2nd HardDisk at this time, I get this error message:
>    mkrootdev: label / not found
>    Mounting root filesystem
>    mount: error 2 mounting ext3
>    pivotroot: pivot_root(/sysroot,/sysroot/initrd) failed: 2
>    umount /initrd/proc failed: 2
>    Freeing unused kernel memory: 164 freed
>    Kernel panic: No init found. Try passing init=option to kernel.
>    
>    
>    
> 6. I think I have to do something about grub on the 2nd HardDisk:
>    #grub
>    >root (hd1,0)
>    >setup (hd1)
>    
>    However, I keep getting the same error message as above: Kernel panic
>    
> What am I doing wrong? Any help is much appreciated.
> 
> Thank you,
> Anwar
> 
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