RAID is always available as a hardware solution

RAID is equivalent for LVM or LVM2

RAID is a alternative of journaling for filesystems

RAID 0 does not provide redundancy

RAID is aimed at being used as a solution for disk backup

RAID is bringing flexibility in partition and filesystems management among multiple disks

RAID can be implemented in software

RAID is an acronym for Redundant Array of Inexpensive Disks

RAID is never usable when there are more 1 disk failures

RAID is usable only for disk redundancy

RAID is usable only for network storage