https://community.hpe.com/t5/disk-enclosures/disk-array-controllers/m-p/2960088#M8273 Hi,<BR />Smart array 2DH is newer than 2/P.<BR />Compaq first array card was "Smart Array",It's EISA interface.<BR />Then Compaq produced second generation array was called "Smart Array 2/P" or "2/E",P was PCI interface,E was EISA interface.<BR />then Compaq produced newer array card was called "Smart Array 2DH" and "2SL",2DH was Dual channel High cost,for high-end server used,2SL was Single channel Low cost,for entry-level server used.<BR />Later compaq produced array card continually,smart array 3xxx,4xxx,5xxx.....<BR />I hope these explanation will help you.<BR />Regards Mon, 28 Apr 2003 07:57:38 GMT Arthur Chang 2003-04-28T07:57:38Z https://community.hpe.com/t5/disk-enclosures/disk-array-controllers/m-p/2960087#M8272 What is the difference between the Smart 2/P and the Smart-2DH Array Controllers.??? Which is newer or more advance.<BR /> Sun, 27 Apr 2003 18:14:44 GMT https://community.hpe.com/t5/disk-enclosures/disk-array-controllers/m-p/2960087#M8272 Devon Wheatle 2003-04-27T18:14:44Z https://community.hpe.com/t5/disk-enclosures/disk-array-controllers/m-p/2960088#M8273 Hi,<BR />Smart array 2DH is newer than 2/P.<BR />Compaq first array card was "Smart Array",It's EISA interface.<BR />Then Compaq produced second generation array was called "Smart Array 2/P" or "2/E",P was PCI interface,E was EISA interface.<BR />then Compaq produced newer array card was called "Smart Array 2DH" and "2SL",2DH was Dual channel High cost,for high-end server used,2SL was Single channel Low cost,for entry-level server used.<BR />Later compaq produced array card continually,smart array 3xxx,4xxx,5xxx.....<BR />I hope these explanation will help you.<BR />Regards Mon, 28 Apr 2003 07:57:38 GMT https://community.hpe.com/t5/disk-enclosures/disk-array-controllers/m-p/2960088#M8273 Arthur Chang 2003-04-28T07:57:38Z