| With the rapid development of computer technology and network technology, data in families is booming quickly. The data includes music, movie image, photos, emails, general documents, popular application software, etc. Without question, people must store and manage these data. How to make the storage and management much more effective is up to people. In recent years, there are many storage equipments in the market. The most popular are flash memory with USB port and hard disk with USB port. However, these products have simple design structure and the lives are short. The most important is that they can't manage data in good way.But as a new product, NAS can meet people's requirements like accessing data remotely, protecting important data and reading data by multi-users. The paper supplies hardware design in NAS system for families and small companies. Firstly, the paper researches the process of network storage development, network storage product types including DAS, NAS and SAN, characteristic of these types, then tell the reason why NAS is suitable for families. Secondly, the paper summarizes the general structure of NAS, after introducing theory basis of NAS hardware technology. The structure is like this: Linux operation system, PowerPC processor, Giga port, DDR2 memory and SATA hard disk. Thirdly, the paper gives the design way for main function modules. Finally, the paper researches the NAS I/O mode, and gives NAS performance test principle according to the I/O path mode. Then the paper lists general standard performance test tools for NAS.The paper analyses typical NAS hardware network topology completely, and then supplies a good hardware function modules solution for families NAS, according to low-end NAS characteristic and current hardware technology. Moreover, the paper gives the generic NAS system I/O simulation mode. As to the mode, we can find easily what affects system performance. The result is a good reference for optimizing families NAS products. |
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