raid1 on existing single drive server

[Teddy Mills]

Is it possible to install RAID1 on a existing single drive server?

ext3 /boot
ext3 /
       /swap

changing the type from ext3 to "fd" raid autodetect.
Will that kill the existing data?

And what about mkfs.ext3 /dev/mdX?
(i am sure that will wax the data)

What other options are there other than stopping the server and drive 
imaging it ?

TIA





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