It shows as a single HDD, totalling 120G[mirrored] if it was RAID 0 it would total 240G.
<A HREF="http://bible.gospelcom.net/cgi-bin/bible?passage=JAS 4:7-10;&language=english&version=KJV&showfn=on&showxref=on&interface=largeprint" target="_new">><></A>