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NAS hardware is similar to the traditional file server equipped with direct attached storage, however it differs considerably on the software side. The operating system and other software on the NAS unit provides only the functionality of data storage, data access and the management of these functionalities. Use of NAS devices for other purposes (like scientific computations or running database engine) is strongly discouraged. Many vendors also purposely make it hard to develop or install any third-party software on their NAS device by using closed source operating systems and protocol implementations. In other words, NAS devices are server appliances.
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DAS systems typically offer fault tolerance at every level with controller redundancy, cooling redundancy, and storage fault tolerance patterns known as RAID. Entry level DAS systems most often are made of an enclosure without active components such as controllers, thus access logic and fault tolerance patterns are provided by the server HBA.
Middle and top range DAS systems provide embedded controllers. RAID management is off-loaded, and simple non-RAID HBAs can be used, lowering costs. DAS controllers also enable shared storage access, which permits multiple servers (usually no more than 4) to access the same logical storage unit, a feature that is mainly used for clustering. At this point, top range DAS systems share similarities with entry level SAN systems. DAS
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IP storage is a general term for several approaches to using the Internet Prototol (IP) in a storage area network (SAN) usually over Gigabit Ethernet. IP storage is an alternative to the Fibre Channel framework of the traditional SAN. Proponents of IP-based storage claim that it offers a number of benefits over the Fibre Channel alternative, and will promote the wide-spread adoption of SANs that was predicted when they were first introduced. Although SANs have been around since the mid-to-late 1990s, they haven't enjoyed the market acceptance that developers expected. Fibre Channel issues, including expense, complexity, and interoperability issues are frequently cited as the cause. According to proponents, IP storage provides a solution to these issues that will enable the SAN to fulfill its early promise.
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Xtore Extreme Storage is a leading storage technology developer and manufacturer. Beyond off the shelf products, Xtore excels at custom development for OEM projects. With a full time staff of engineers, Xtore can modify existing products to meet your needs or develop new products from your ideas. Xtore brings vertically integrated capabilities that include full end-to-end design and manufacture for software, firmware, PCB's, enclosures, and more. Xtore is ready to meet your custom project needs.
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AS the world-wide leading server and storage chassis manufacturer, AIC focuses its core competencies on providing solutions for industrial computer enclosures in the heavy-duty EMI-RFI-resistant steel chassis. Our full range product line ranges from 1U to 8U. We are proud to provide scalable and cost-efficient chassis solutions at the core of every business level, from entry-level to enterprise-level market.
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