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Description
RAID stands for Redundant Array of Inexpensive/ or Independant Drives.A RAID array is a collection of drives which act as a single storage system, which can tolerate the failure of a drive without losing data, and which can operate independently of each other.The basic idea of RAID is to combine multiple drives into an array of drives to obtain performance, capacity and reliability that exceeds that of a single large drive. For the different levels of RAID see here.
Software RAID is just like hardware RAID, except that it uses software instead of hardware.Instead of using a dedicated hardware controller to perform the various functions required to implement a RAID array, these functions are performed by the system processor using special software routines.
If you are already running an operating system that supports software RAID, you have no additional costs for controller hardware; however you may need to add more system memory to the system.
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