ASUS P4P800 Deluxe - Adding RAID 1 after the fact?

Archived from groups: alt.comp.periphs.mainboard.asus (More info?)

Anyone with experience adding RAID 1 after the initial setup and use? I
built my system months ago and use 2 x 120gig WD's in RAID 0. Now I
would like to go back and add 2 more 120's as a RAID 1 to mirror the
exisiting HD's.

It appears that there are two RAID ports and that I should be able to
set the 2 new HD's up as master and slave and then use the 2nd cable
that came with the mobo and then use the RAID software to set the mirror up.

Anyone ever done this and if so any suggestions or comments? I assume no
impact on my existing RAID 0 setup and no need for any particular
concerns but wanted to shop the experts.

Thanks