I would ask if FlexCache (PAMII) coul be dedicated to only one Volume.
On FAS3140 with 2x2-512GB PAMII cards. Could they be configured to a dedicated state, where the web service LUN would be, and the data would be only on the PAMII and never touch disk drives. Then the customer wouldn’t need the RAMSAN-620-1TB or the SSD drives ?
This way we would get the customer to use NetApp storage all the way.