RAID 0, Striping without parity, high performance no fault tolerance, RAID 1, mirroring,  duplicates data for fault tolerance but requires twice the disk space, RAID 5, striping with parity , fault tolerance most redundancy 3 disks, RAID 10, but, incremental backup, new files and files modified last back up, full backup, all selected data , differential backup, all data modified since last full backup.

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