User`s manual

C-1
SATA RAID
SATA RAID
Appendix C
The integrate one SATA host controller separately, and
support RAID function for performance and reliability.
SATA RAID provides support for RAID 0 (Striping), RAID
1 (Mirroring), RAID 0+1 (Striping & Mirroring) & RAID 5
(striping with parity). 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 t
o two
d
rives. Drives configured for RAID Striping 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. RAID 5 defines
techniques for parity data.
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