Currently running a POC of Delphix. The Delphix Engine is using 3 LUNs on a EMC VNX5600 8 disk RAID 1/0 15K drives the OS sits on a different set of disks, and the array has FAST Cache enabled. The Delphix IO test pretty much failed miserably on the writes. The array is not heavily used, is it recommended to have FAST Cache turned off on the storage pool for the Delphix Engine? Is the 8 disk RAID 1/0 too few disks?