RAID 0: This configuration has striping but no redundancy of data. It offers the best performance but no fault-tolerance.  RAID 0 advantage is that it improves performance. Because of segmented data scattered in multiple physical drives, multiple disks can access the contents of a file, to allow faster finish read and write. A disadvantage of the RAID 0 is that it has no parity. If driving should fail, without redundancy and all data will be lost.

RAID 1: Also known as disk mirroring, this configuration by at least two replicate data storage of the driver. Didn't open it. Performance improvements, because read disk can be read at the same time. Write a single disk storage performance is the same.

Raid 2: use this configuration section with some disk is stored in the disk error checking and correction of information (ECC). It has no advantage RAID 3 and is no longer used.

RAID 3: This technique using segmentation and is committed to a drive storage parity information. Embedded ECC information is used to detect errors. Data recovery is calculated exclusive or (XOR) information recorded on another drive. Because of an I/O operation address all drive at the same time, the RAID 3 cannot be overlapped I/O. For this reason, RAID 3 is the best single user system for a long time record of the application.

RAID 4: This level uses large stripes, which means you can read records from any single drive. This allows you to use overlapped I/O for read operations. Since all write operations have to update the parity drive, no I/O overlapping is possible. RAID 4 offers no advantage over RAID 5.

RAID 5: Provides data striping at the byte level and also stripe error correction information. This results in excellent performance and good fault tolerance. Level 5 is one of the most popular implementations of RAID.

RAID 6: this method is similar to RAID 5 but the second parity plan, is distributed across the drive in the array. Use extra parity allows array and continue to function even if the two disk failures. However, this additional protection comes at a price. A RAID 6 array per gigabyte (GB) and the high cost is often slower than raid5 array write performance.

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