Guidance on Multi System Installation in an UEFI World

Following demise of my OS/2 machine I am building a new one and have reached the software & partition installation planning stage and as usual am struggling. The new system has Asus P8H77-V LE mobo with i5-3570K processor, 8GB memory and 2TB sata drive. Mobo boasts UEFI Bios. I am not sure where to start!!!

I wish to be able to boot to either OS/2 (which will now be eCS2) and openSUSE 2.3 but our accounting software (Sage) must have windoze which is likely to be the “7” variety.

I am spoilt for choice with options, articles and posts to read but think I want a modern booting method which uses an UEFI partition with Grub2 managing the boot process. If I install openSUSE 12.3 first I can try VM versions of both other operating systems but how should I protect the option to be able to install native versions if that proves necessary.

If there is an up to date article which answers please point me there.


You should be able to put the UEFI into compatibility mode and use the old MBR formating of the drive(s). This simplifies things and none of the OS option you want require UEFI. Not at all sure about OS/2 and UEFI. Unless someone i updating it I doubt it knows anything about UEFI

Hi and thanks for the thoughts. I have yet to learn whether eCS has yet been adapted for UEFI so have left Bios with old MBR formatting enabled and am watching first installation (network) of 12.3 as I type on another machine.


Do you really mean IBM OS/2 operating system? If so you have lived the dream about 15 years longer than I had.

You never said how much data your business uses or if this was a dual purpose machine (business and personal).

If I were you I would install the whole disk with openSUSE and then just run VirtualBox with windows 7 or whatever Sage or your business needs.
If you want to be sure an OS upgrade will not screw up your business junk then make it easier to back up your business stuff by making a separate partition (say DATA) where VirtualBox can store all of your guest disks.

For example, when you install oS you can create the default (/, /home, /swap) partitions and also create one named /sage for your business. This would allow you to back up the /sage partition separately from all your other data.

Hi and thanks for the excellent suggestion. I did a reply to thank you earlier and it has gone awol. Reason for not going straight to VM is I am not yet confident in my own skills with it and also there are some issues with OS/2 installation. I think eCS will be what I must use but I have had a long and sometimes happy use of OS/2 (Warp 4.5) until this year.
Thanks again,