Convert existing CentOS 4.3 install to RAID1

I have an existing CentOS 4.3 install on an IDE harddrive. I would like to add a second IDE harddrive of the same size to the machine and do software RAID 1. I have seen many complicated ways to do this. What is the best and easiest way to do this?
m9s999Asked:
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pjedmondCommented:
Essentially:

1.    Install RAID tools.
2.    Configure /etc/raidtab
3.    mkraid

Sit back and wait!

http://www.tldp.org/HOWTO/Software-RAID-HOWTO-5.html

Para 5.6 for your desired configuration (inc example raidtab)

HTH:)
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m9s999Author Commented:
That looks much easier. We will try it out.
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