The direct matrix is a backplane that all the boards connect to.  Each director and board would have its own connections to and from cache on the backplane.  The virtual matirx is a fabric that each director in the VMAX system uses to connect to one another.
hello All,  can any one help me understand how VMAX is different from DMX architectural wise -- I know the difference in their Hardware features ,but when it comes architecture - How virtual matrix different from direct matrix architecture. Pointers would help.  sorry if this is real basic stuff , I am not having much experiance in symmetrix so..  thank you for reading !
architectural difference between symmetrix and VMAX