RAID technology is used to protect data as well as provide more efficient data access and capacity utilization with disk-based subsystems. By placing data on multiple disks, I/O (input/output) operations can overlap in a balanced way, improving performance. Using multiple disk drives increases the Mean Time Between Failure (MTBF), while storing data redundantly and this increases the fault-tolerance of the entire system. To meet requirements such as utilization, performance, and data protection, there are several types of RAID implementation including RAID0, RAID1, RAID5, and combinations such as RAID10 and RAID50. RAID0 provides the highest performance but no redundancy while RAID1 mirrors the data stored in one hard drive to another and can only be performed with two hard drives.
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