Which is best option between concatenation and striping a lun to create a metalun in the clariion environment?

The answers I have seen on this blog, are hopeless. They are not coming close to what I'm interested in.

Can you explain what " concatenation and striping a lun" is? The Clarion environment is not a very common one. So it is not surprising you would not find much support for that. I suggest you try here:

https://community.emc.com/message/490570

You should find what you are interested in there.

As for your condemnation of this site, I stand by the quality of the advice given here. However , we do not have experts covering every single area of knowledge. There are some things that require more specialized knowledge, I also find it interesting that you post a question then 2 minutes later you condemn the site. Doesn't give one much confidence in the quality of your opinion. .