Jim -
What an interesting question. It's one I haven't been able to find the answer to !
They've got to be stored somewhere, but I can't find a file changing as I create/destroy an igroup on my sim, nor can I grep the igroup from any files.
? ? ?
Best suggestion for a backup would be to write up a script to parse out an 'igroup show' command output.
I hope this response has been helpful to you.
At your service,
Eugene E. Kashpureff
ekashp@kashpureff.org
NetApp Instructor and Independent Consultant
http://www.linkedin.com/in/eugenekashpureff
(P.S. I appreciate points for helpful or correct answers.)