Yes. For the smaller VNXs there are two different DPEs (2 SPs and 15 * 3.5" drives or 2 SPs and 25 * 2.5" drives) and for all the VNXs there are two DAEs (15 * 3.5" drives or 25 * 2.5" drives).
Reading about the VNX machines I came accross the following about disk sizes, rotational speeds and platter sizes in inches: in document "h8514-vnx-series-ss.pdf" I read that the 10k drives are 2.5 inches and the 15k drives 3.5 inches. I always thought that the faster a disk rotates, the smaller a platter should be because of the speed the edges of a platter reach. In fact: I opened a few 15k drives that were broken and I noticed that indeed the 15k drives contain the smaller platters and the 10k drives contain the "larger" 3.5 inch platters.  So why is this reverse with the VNX ? Or is this simply a typo ?  [IMAGE]  Can someone explain to me why the slower drives are also smaller ?
10k drives versus 15k drives: rotational speed issues