RAID level 0 is used in high-performance applications where data loss is not critical.
RAID level 1 is popular for applications that require high reliability with fast recovery.
RAID 0+1and 1+0are used where both performance and reliability are important—for example, for small databases.
Due to RAID 1’s high space overhead, RAID 5 is often preferred for storing large volumes of data.
Level 6 is not supported currently by many RAID implementations, but it should offer better reliability than level 5.