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Two major challenges facing the storage industry today are keeping pace with the increasing performance demands of computer systems
by improving disk I/O throughput and providing data accessibility in the face of hard disk failures.
The idea of RAID (Redundant Array of Independent Disks) was first introduced by David A. Patterson, Garth Gibson and Randy H. Katz at
the University California at Berkeley in 1988. RAID is a purpose of storing the same data in different places on multiple hard disks and
improves storage subsystem performance. The advantage of RAID is to provide better throughput performance and/or data fault tolerance.
Better performance is accomplished by sharing the workload in parallel among multiple physical hard drives. Fault-tolerance is achieved
through data redundant operation where if one (or more) drive fails or has a sector failure, a mirrored copy of the data can be found on
another drive(s).
A RAID appears to the operating system to be a single logical hard disk. The RAID controller manages how the data is stored and
accessed across the physical and logical arrays. The RAID controller help users to ensure that the operating system only sees the logical
drives and users do not need to worry about managing the complicated schema.
For optimal performance results, select identical hard drives to install in disk arrays. The drives' matched performance allows the array to
function better as a single drive.
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Warning: The Serial ATA RAID function
can be supported under Windows XP and
Windows .Net environments.
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