I am trying to set up a RAID configuration and wanted to confirm that I am doing it correctly. I purchased two Seagate 400gb IDE drives and have them in a two bay USB 2.0 enclosure. The enclosure is supposed to allow both drives to be set to master. I am setting them up to use with my Macbook Intel 2.0 running 10.4.6. If I understand correctly all I have to do is use the disk utility and drag both hard drives to the RAID setup. I planned on using a RAID 1 for mirroring. Is there anything else I need to do? Once completed what do I need to know about using the drives? It is my understanding that if one drive is altered it automatically has the other drive duplicate once it is activated. Any help or suggestions would be appreciated. Thanks.