RAID 0 - Disk Striping
With RAID 0, or a configuration known as "data striping", data is written in sequential sections across more than two drives. RAID 0 is easy to implement, and it can dramatically improve performance. Several drives can be accessed at once, minimizing the overall "seek" time of larger files. This configuration has no data redundancy and therefore no protection against data loss, however, so it should not be used for business-critical applications.
RAID 1 - Mirroring
Also known as "drive mirroring", RAID 1 simultaneously copies data to a second drive. The mirroring method offers data protection and good performance in the case where a mirrored drive fails. RAID 1 is the simplest RAID configuration, requiring only a minimum of two drives with equal capacity, and also that the drives be added in pairs. The main disadvantage of RAID 1 is that it uses 100% drive overhead (the highest of all RAID levels), which can be considered an inefficient use of drive capacity. |
