Supported RAID levels

The level of a disk array refers to the manner in which data is stored on the disk and the level of protection that is provided.

The RAID level of a disk array determines how data is stored on the disk array and the level of protection that is provided. When a part of the RAID system fails, different RAID levels help to recover lost data in different ways. With the exception of RAID 0, if a single drive fails within an array, the array controller can reconstruct the data for the failed disk by using the data stored on other disks within the array. This data reconstruction has little or no impact to current system programs and users. The SAS RAID controller supports RAID 0, 5, 6, and 10. Not all controllers support all RAID levels. See the Feature comparison of SAS RAID cards table for more information. Each RAID level supported by the SAS RAID controller has its own attributes and uses a different method of writing data. The following information details each supported RAID level.