Maybe this has been answered, but I didn't find it via search (I did look). I have an Airport Extreme and it currently has a Maxtor 320GB drive on the USB port. But I want to get a 1 TB and use it as a 500GB mirrored RAID (for backups using either Backup and/or Retrospect, plus RAW camera file storage). I was looking at the Western Digital MyBook Pro or Premium 1 TB drives for this purpose. However, this Apple article states only hardware RAID works with the Extreme. I believe the WD MyBook drives are software RAID. Is it correct that I cannot use the 1 TB MyBook drives with the Airport Extreme? Otherwise, has anyone gotten it to work? If not bummer because I really wanted to do a mirrored drive, and I suppose a hardware RAID is going to be pricey, unless someone has recommendations to the contrary. BTW: I'm a recent re-switcher. Started in the 80s with a Fat Mac and Mac Plus, and switched to Solaris and Windows in the late 90s (Apple's fault to a big degree). Now Im back with a new 17" MBP (plus a 15 for the wife) after having had enough with my Dell craptop. Life is good again.