What Is RAID
RAID (Redundant Arrays of Independent Drives) is a technology that combines multiple drives into a drive array with huge capacity. It will utilize multiple drives to improve the performance of the drive array.
RAID can be divided into three types: external disk array cabinet (so-called hardware RAID), internal disk array card (so-called hardware-assisted RAID), and software simulation (so-called software RAID).
Generally speaking, hardware RAID is better than hardware-assisted RIAD, which is also better than software RAID.
Hardware RAID has a RAID card mounted with a RAID controller, a special I/O processing chip, and an array buffer. These devices make hardware RAID has the best performance. However, hardware RAID is usually applied in servers because it is expensive.