With NetApp jumping on the SSD drives, in addition to their previous solid state lineup consisting of the PAM-II cards, I really wonder why they chose to fit these drives only in the DS4243 shelf. The density of SSD drives would make them a perfect fit for the DS2246 shelf, and it would provide even greater performance/density/power ratio. Are there SSD drives planned in the future for the new 2,5" shelf?
The reason the SSDs are in the DS4243 shelf and not the DS2246 shelf was a time-to-market reason. Combining the intro of both SSD and DS2246 added risk to bringing each new capability to market in a timely fashion. Now that the DS2246 is shipping, there is the flexibility to use it in the future with SSD.