I've heard that the default extent size for V7000 v7.1.x is now 1024MB? Can somebody confirm this to me?
I would suggest: just create an empty mdiskgrp with gui. The detailts screen will show the default extent size.
With the CLI you need to specify the -ext value.
Yes, confirmed. Is your V7000 a new setup or old?
Yes I actually confirmed it that after 7.1, the default extent size is now 1024MB. Ours is old setup and we upgraded it to 7.1.