Whats the difference between RAID and ordinary hard disk storage systems for CCTV images?
From a CCTV perspective, digital storage of video images on a hard drive (typically using a DVR) is no different from other media stored on a conventional PC. Consequently the system processor makes decisions about where data is stored, depending on available disk space. With RAID configured systems, video data is managed in a more logical and secure fashion. The ultimate aim is to achieve a much greater level of data protection and provide disaster recovery in the event of disc failure. Q: What types of RAID systems are commonly used in CCTV? A: 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
