On 04/07/12 11:16, Clive Woodfine wrote:
> I have Ubuntu 10.04 and 12.04 on the first hard drive of my desktop
> machine. I thought I would try Fedora 17 so I installed it on the
> second hard drive and had it boot from that drives MBR not wanting to
> risk not being able to boot the other two. I thought Grubs os-prober
> on the first drive would find Fedora. It does not.
>
I had a problem where grub2 on Ubuntu woudln't find Centos installed on 
a separate partition.  It turned out that Centos used LVM for its disks, 
but I hadn't used that on Ubuntu.  As soon as I installed the LVM 
libraries on the Ubuntu (apt-get install liblvm2app, as far as I can 
remember), grub found Centos.
Simon
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