On Saturday 09 August 2014 11:23:10 Alan McRae wrote:
No problems Joe. I have done this multiple times.
I assume you have Fedora 20 on sda (the first disk) with the bootloader (grub2) on sda. Your BIOS will be set to boot sda.
You install CentOS 7 on sdb (obvious).
Your options are with the bootloader (grub2). If you install the bootloader on sdb the two systems will remain separate. You will have to change the BIOS to boot either sda (F20) or sdb (C7).
The way I prefer would be to install the new bootloader on sda (overwriting the current configuration). Your BIOS will still boot sda which will take you into the grub2 menus which will show both Fedora 20 and CentOS 7.
You need to be aware that in the above configuration sda will boot into /boot on sdb (C7) which will have the dual boot menus. Don't wreck this directory or you won't be able to boot F20 (easily).
The F20 and C7 installers are very good. They scan the disks for linux and Windows installations and add them into the boot menu for you.
I have a laptop which boots C7, C6, F20, XP and 3 versions of Android using grub2.
Alan
I'v been trying to dual boot windows 7 and CentOS 7 for a week now without any luck.
CentOS 5/6 and Fedora 20 recognise the Windows installation and place an entry for it on the boot menu.
CentOS 7 anaconda recognises the Windows 7 ntfs partition at installation time as unknown but doesn't place an entry for it in the grub2 boot files. Did you install CentOS 7 last.
Tony