RAID 5 vs. RAID 0+1 vs. RAID 1+0

I know Oracle recommends RAID 0+1 or 1+0 for OLTP systems (particularly for small, random writes) because of the RAID 5 write penalty. Does anyone have any direct experience or information on how big the difference is or how many concurrent users you'd need to have to make a significant difference?

Also, what do people think of the 'SAME' (stripe and mirror everything) methodology where you mash everything together in the same stripe?

TIA Received on Wed Jul 31 2002 - 23:24:54 CDT