08-12
24

The Common RAID levels—RAID 0

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AuthorEASEUS   Category Basic Computing Guide   Comments0   Post Time 2008-12-24 04:03:13 -0500

RAID 0, it is also called stripe set or striped volume. RAID 0 splits data evenly across two or more disks (striped) with no parity information for redundancy. It is important to note that RAID 0 is not one of the original RAID levels and provides no data redundancy. RAID 0 is normally used to increase performance, although it can also be used as a way to create a small number of large virtual disks out of a large number of small physical ones.


A RAID 0 can be created with disks of different sizes, but the storage space added to the array by each disk is limited to the size of the smallest disk. For example, if a 250 GB disk is striped together with a 320 GB disk, the size of the array will be 500 GB.


Although RAID 0 is not specified in the original RAID paper, an idealized implementation of RAID 0 would split I/O operations into equal-sized blocks and spread them evenly across two disks. RAID 0 implementations with more than two disks are also possible, though the group reliability decreases with member size.

RAID 0 is useful for setups such as large read-only files or video servers where redundancy is irrelevant. RAID 0 is also used in some gaming systems where performance is desired and data integrity is not very important.

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