Database Software

I am looking to see what situation is better regarding my ASM setup and what the striping behavior would be. I am using OEL 5 update 2 x86-64 and Oracle Database 11gR2 and ASM 11gR2.

Setup 1
4 Physical HD RAID 5
4 100 Gb LUNS
1 ASM Disk for each LUN
2 ASM Disk Groups (DATA and FRA)
2 ASM Disks per ASM Disk Group

Setup 2
4 Physical HD RAID 5
2 200 Gb LUNS
1 ASM Disk for each LUN
2 ASM Disk Groups (DATA and FRA)
1 ASM Disk per ASM Disk Group

Question 1:
In Setup 1, since ASM Disks for Data Disk Group are on the same physical disks, would this cause significant hot spots. I understand there would undoubttedly be contention.

Question 2:
Setup 2, ASM would not fail since it can't stripe in this setup with only one ASM Disk. In other words, ASM would work but simply wouldn't stripe even though the underlining Physical HD are being striped via RAID 5.

Question 3:
Which setup is better in terms of availability and performance?


Thanks.