SSD use non-volatile memory as a storage space, with low power, mute, aseismic, high performance advantages. In the manufacturing cost getting low, gradually replacing the existing 60-year-old HDD. In this paper, we compare the SSD and HDD applied to the data capacity is small, duplicate content is high whether e-mail system can still achieve the desired performance is the focus of our attention, as a enterprises adopt HDD or SSD reference architecture assessment. Although the test results obtained by the SSD performance is still much larger than the HDD performance, but the high cost of SSD, when irreparable loss of data problems is need to be consideration.