MSI RD480 Neo2 - Manual (Page 116)

6-1
Introduction to ULi M1573 RAID
Chapter 6. ULi M1573 RAID Introduc-
tion
ULi south bridge M1573 integrate a SATA host controller that supports
four SATA ports and RAID function for performance and reliability.
SATA RAID provides support for RAID 0 (Striping), RAID 1 (Mirroring),
RAID 0+1 (Striping & Mirroring) and JBOD (Just a Bunch of Drives). RAID 0
greatly improves hard disk I/O performance by concurrently striping data
across multiple drives. RAID 1 makes sure data is not lost if a drive fails as
data is simultaneously written to two drives. Drives configured for RAID Strip-
ing are said to form a RAID 0 set, while drives configured for RAID Mirroring
are said to form a RAID 1 set. RAID 0+1 is implemented as a mirrored array
whose segments are RAID 0 arrays. RAID 0+1 has same fault tolerance as
mirroring and reduces overhead by striping. It needs at least four drives to
form a RAID 0+1. JBOD is to expand the capacity of drive through creating a
virtual drive which combines more than one disk. The total capacity is the sum
of all drives. The failure of one drive will result in data lost in array.
Introduction to
ULi M1573 RAID