因此，在这样的系统中，作为存储设备的磁盘阵列要具有高可靠性和一定的容错能力。

So, in such systems, the disk arrays, as storage system, should be high reliable and have fault-tolerant guarantee.

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RAID是廉价冗余磁盘阵列的简称，它把多磁盘驱动器连接到一起协同工作，提供并行的数据传输和容错功能。

RAID Redundant Array of Inexpensive Disks, groups many disk drivers in a storage unit to perform parallel data transfer and offer fault-tolerant.

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