Your logical drives show up top represented as volumes. The Desk0 desk1 are real drives connected to the main board.
Drives set up in RAID indeed my show up as one drive. I don't use RAID 0 because the loss of one drive will result in the loss of all data so the reward isn't worth the risk to me. And unless you run a server you shouldn't be running any thing other then RAID 0 unless you just like mirroring your disks.
