A quick note to clarify SAS cabling between EMC VNX and extra enclosures or DAE’s as they are called.
When setting up a VNX with only the base DPE enclosure, there’s no need for cabling.
When adding the first and the second enclosure, you need a special kind of SAS cable, called the “mini-SAS to mini-SAS HD cables”.
When adding a third enclosure or more, you need a “mini-SAS to mini-SAS cable”.
The following is an overview on the partnumbers for both situations: