Jeff Miller created a quick and dirty tutorial on how to create a MetaLUN on an EMC SAN.
Here are the steps involved in creating a MetaLUN on an EMC Clariion CX4.
The steps below show creating 4 LUNs of size 6,400 MB which are then expanded into 1 LUN of 25 gigs.
Photos 1 and 2 will need to be performed 4 times in order to create all 4 LUNs, and I set these up as follows:
LUN 3924 Raid Group 27 raid 1+0 LUN ID 3924 6,400 MB
LUN 3925 Raid Group 26 raid 1+0 LUN ID 3924 6,400 MB
LUN 3926 Raid Group 25 raid 1+0 LUN ID 3924 6,400 MB
LUN 131 Raid Group 24 raid 1+0 LUN ID 3924 6,400 MB
I then expanded LUN 131 to the full capacity of 25 gigs by striping it across the 3 other LUNs. 
You can find more of Jeff’s docs online at his new blog.
