RAID 0

Learn how data is written to a RAID 0 array.

RAID 0 stripes data across the disks in the array, for optimal performance. For a RAID 0 array of three disks, data would be written in the following pattern.

Figure 1. RAID 0

RAID 0 offers a high potential I/O rate, but it is a nonredundant configuration. As a result, there is no data redundancy available for the purpose of reconstructing data in the event of a disk failure. There is no error recovery beyond what is normally provided on a single disk. Unlike other RAID levels, the array controller never marks a RAID 0 array as Degraded as the result of a disk failure. If a physical disk fails in a RAID 0 disk array, the disk array is marked as Failed. All data in the array must be backed up regularly to protect against data loss.