[CentOS] CentOS5/6 Dual Boot

m.roth at 5-cent.us m.roth at 5-cent.us
Fri Jul 15 19:57:42 UTC 2011

Camron W. Fox wrote:
> Alle,
> We currently have a CentOS 5.6 x86-64 server running using about 70G of
> a 500GB hardware raid partition. We'd like to install 6.0 alongside this
> installation in a dual boot configuration. We tried to install using the
> "Use Free Space" installation option, but the installer did not see the
> 475G of unused space.
> Is there any good way to do this, or is it even feasible?
Repartition first; if it's a hardware RAID, then in the firmware setup you
should be able to break off part, and then make two partions: one of about
250M or so, for /boot, and the rest, larger, for the rest. Once you've
done that, and the BIOS sees the partitions, you should be able to

I have a much longer discussion at <http://24.5-cent.us/>, in the article
"Upgrading Linux" that I published a few years back.


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