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What types of RAID systems are commonly used in CCTV?

April 26, 2017CCTV Commonly raid SYSTEMS types Used

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What types of RAID systems are commonly used in CCTV?

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RAID 0 systems are often used to increase overall archive capacity, and thus provide cost efficiency. However, RAID 0 systems don’t provide any extra data security; for that RAID 1 or RAID 5 configurations are commonly used. With RAID 1, all CCTV images are written in duplicate (requiring at least two disks). This doubles the number of disks needed, but it also means that if one disk fails, or if video evidence in impounded, no images are lost because the mirrored archive is still available. RAID 5 is a little more refined. Data for the images is striped over several disks. The system also produces and stores additional parity data. If a disk fails, it can use this parity data to rebuild the images that would otherwise be lost. There is a disadvantage with RAID5 in that if the data is impounded by the police, there may not be a ‘mirrored’ version of the removed data available.