The demands of business for enhanced data availability and protection have led to the implementation of data disaster avoidance and recovery strategies. Among these is the implementation of Redundant Array of Inexpensive Disks (RAID) 5 to enable data storage arrays with a cost-effective mix of disk striping with rotating parity. This foundational technique is, however, processor-intensive and tests the scalability of various RAID product implementations. This paper surveys the range of RAID 5 product implementations in the market and makes the case that an 'Intelligent' implementation, consisting of a host-independent combination of processor and memory, is best suited to arrays that host the data of high-performance, mission-critical applications.
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