stimzuk
thank you very much, this is what i want to do.
Keep in mind that when you insert/swap in a drive into the RAID1 array, the new drive should be totally blank, or the array may boot up & resync to the wrong (old) data set, on the drive you just inserted.
You can blank the drive partitions first using delpart.exe (google for it) or a similar partition deletion tool, or even a suitable Linux command.
For safety reasons this is probably best done on another machine, ie to avoid accidently deleting the wrong drive contents.
Then use the admin console to rebuild the array, and in an hour or two you have a fully working RAID1 plus a seperate off site bootable drive (fully configured).