Use this screen to select RAID levels.
RAID 10 maintains a full data copy. RAID 10 uses data redundancy to ensure data accessibility in case of a disk failure. The storage overhead is 2n where n is the number of disks. For example, 1GB of data will consume 2GB of RAID 10 storage.
RAID 5 uses rotating parity. The storage overhead is 1/n where n is the number of disks. If there are 5 disks, the storage overhead is 20%, meaning 1GB of data consumes 1.2GB of RAID 5 storage.
For volumes using RAID 10 or 5, the system automatically detects disk failures and rebuilds the data using a hot spare.
RAID 0 stripes the data across all available drives in the volume but does not provide any redundancy in case of a disk failure.
Recommendations
RAID 5 or 10 is strongly recommended for most production environments. If there is a disk failure, these levels provide continuous access to data.