Setting up Ubuntu Server with software RAID 1

I'm looking to setup RAID 1 on my Ubuntu server and I'm not quite sure how. I have a total of 4 hard drives in the server ( 2x300gb and 2x1TB) and I'm looking to setup both the system drive and the secondary drive as RAID 1. How would I go about doing that?
supanaturalAsked:
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activeitnetworksCommented:
Have a look at this, the procedure should be fairly similar if not identical with the server version:

http://kuparinen.org/martti/comp/ubuntu/en/raid.html
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supanaturalAuthor Commented:
This system is already been deployed. Is there a way to add a RAID to a production server?
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marmata75Commented:
Do you mean that you already have data on all four hard disks? You can setup RAID on a 'live' system, but if you've data on all your disks, you'll at least to empty a member, to properly enable mirroring and don't lose any data.
This article is a good start, you don' t need to install mdadm on Ubuntu as it's already there!
http://www.howtoforge.com/software-raid1-grub-boot-debian-etch

Cheers,
]\/[arco
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