Emerging nanotechnology-based systems encounter new non-functional requirements. This paper addresses MEMS storage, an emerging technology that promises ultrahigh density and energy-efficient storage devices. The authors study the buffering requirement of MEMS storage in streaming applications. They show that capacity and lifetime of a MEMS device dictate the buffer size most of the time. Their study shows that trading off 10% of the optimal energy saving of a MEMS device reduces its buffer capacity by up to three orders of magnitude.