Le 03/02/2012 19:05, Pierre Jarillon a écrit :
I have installed Mageia on a disk after Ubuntu.
After the install, I reboot and Ubuntu was ignored in Grub.
The owner of the PC was not happy and tought that Mageia is bad.
I have not found how to restore an access to Ubuntu and after an hour, I have
reinstalled Ubuntu which install its grub2 allowing to boot on both systems.
In Caudron, grub2 is not still used. Is time to switch to Grub2 ?
I have installed both ubuntu and mageia with no problem with regard to booting
ubuntu.
You must have left ubuntu put the bootloader on the MBR. If you are going to
install several Linux distribution you should install the OS on partitions and
not on the MBR.
On my PC I use xosl as a bootloader and always install grub on the boot
partition. A few years back I got burned when I forgot to change the default.
One thing that pisses me off on all the Linux distribution, including Mageia is that the fact that the bootloader is on the MBR is sorta hidden and it is not obvious how to switch it to the partition. It should be on the top with boxes with the choice of
where we want it and a message that is not cryptic and makes it obvious what that does. That way I don't see where we could accidentaly screw up our system.
There is no problem if you have only one operating system to have grub on the
MBR but brain dead to put it there when you have several OS. Specially when you
have diffferent incompatible versions of grub.
The way I recovered the messed up boot was to boot on my xosl boot diskette and
restore its boot.
Here is the layout of one of my hard disks.
Périphérique Amorce Début Fin Blocs Id Système
/dev/sda1 1 1 8001 78 Inconnu <-- xosl
/dev/sda2 2 261 2088450 6 FAT16 <-- Free Dos
/dev/sda3 * 262 276 120487+ 83 Linux
/dev/sda4 277 243201 1951295062+ 5 Etendue
/dev/sda5 277 750 3807373+ 82 Linux swap / Solaris
/dev/sda6 751 765 120456 83 Linux
/dev/sda7 766 780 120456 83 Linux
/dev/sda8 781 795 120456 83 Linux
/dev/sda9 796 60000 475564131 83 Linux
/dev/sda10 60001 120000 481949968+ 83 Linux
/dev/sda11 120001 160000 321299968+ 83 Linux
/dev/sda12 160001 200000 321299968+ 83 Linux
/dev/sda13 200001 243201 347012001 83 Linux
Michel
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