dual boot test

bruce badouglas at gmail.com
Fri Dec 27 20:48:43 UTC 2013

Hi Chris,

For my tests right now, I'm simply trying to get dual Centos up/running,

Based on what you've said, there are errors in what I'm trying to
accomplish. You wouldn't have a few mins to walk me through this would

I'm convinced that this is doable, and that whatever mistakes I've
made are probably subtle/easy to correct.

Do you happen to know of a good tutorial for this that walks through
all the steps.


On Fri, Dec 27, 2013 at 3:30 PM, Chris Murphy <lists at colorremedies.com> wrote:
> On Dec 27, 2013, at 12:34 PM, bruce <badouglas at gmail.com> wrote:
>> Hi - I know I should probably post to centos, but I'm testing this
>> with centos, and then with fedora.
> CentOS 6 uses grub legacy. Fedora uses grub2. They are completely different, FYI.
>> set the boot to be on sda1 - as 500M
> In grub legacy that's (hd0,0)
>> I then went back and installed the 2nd install of the Centos OS
>> using
>> lv2_root       root       /              10
>> boot
>> lv2_home     home    /home2      5
>> lv2_apps      apps     /apps2       5
>> lv2_backup  backup  /backup2    5
>> the boot was set to be the "/" on the sda so  it's the same as the 1st..
> This description isconfusing. You have two / on sda, VolGroup/lv_root and VolGroup-lv2_root. I have no idea what "same as the 1st" means because boot on rootfs is not the same thing as CentOS install #1 which uses a separate /boot on sda1.
>> title Centos2 (2.6.32-431.e16.x86_64)
>>    root (hd0,1)
> This is pointing to /dev/sda2 which is LVM. /boot cannot be on LVM using grub legacy, so in fact you ought to use a single shared /boot since they're the same distro.
>>    kernel /vmlinux-2.6.32-431.e16.x86_64 ro root=/dev/sda2
> The root= entry is completely wrong, you're pointing gruby to an LVM PV rather than to the specific 2nd install root LV.
> Chris Murphy
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