Re: mounting RHEL boot disk under Ubuntu

[Hurf Sheldon <]

I've experienced the fact that Linux gets confused when there are two disks
with MBR's in the system that both say "boot from 0 disk" (paraphrase - 
don't have the syntax in mind)
You can boot an install disk to a shell and use the recovery shell to 
edit grub or
lilo in the second disk or do something to erase the MBR. You can try to 
trick it: re-attach the
new disk after a successful boot without it to see if it will come up ok 
because the second
disk may need to go through the new hardware discovery process once to 
be seen. Then you can run
sfdisk to wipe the mbr partition on the new disk.
hurf



You can run Rick Cochran wrote:
> I tried moving the boot disk from an old RHEL box to a new Ubuntu 
> box.  Mount said that it didn't recognize any filesystems.
>
> I discovered that Ubuntu doesn't install or use lvm by default.  RHEL 
> uses lvm.  I installed lvm on the Ubuntu box.  I also installed 
> evms-gui.  It could see the logical volumes on the RHEL disk, but I 
> still couldn't mount them.
>
> I rebooted to see if that would make any difference.  It did - Ubuntu 
> dropped into BusyBox.  :-(
>
> I removed the RHEL disk, and Ubuntu boots properly now.
>
> Two questions:
>
> What happened?
>
> How can I regain the use of (if not the data from [which I backed up 
> painfully but successfully in advance thank God]) the RHEL disk?
>
> -Rick