there is always documentation section for each platform:  Home > Support > Technical Documentation and Advisories > Hardware/Platforms Documentation > Symmetrix DMX FamilyHome > Support > Technical Documentation and Advisories > Hardware/Platforms Documentation > Symmetrix VMAX Series  also download Solutions Enabler CD, good stuff in there as well  Solutions Enabler 7.2 Documentation CD
Hello All,  I know this is going to be a very basic question , but it will be nice if you guys can help me understand how symmetrix functions? Basically , I am looking at the architecture of symmetrix DMX3 Model and want to understand the I/O operation in these devices.  I have more exposure to celerra and Clariion , but i need to manage the DMX and VMAX boxes as well so I felt this to be the right place.  Any Document and little explanation will help!  Thank you all for the time !
DMX 3 architecture and I/O operation