The integrate one SATA host controller separately, and
support RAID function for performance and reliability.
SB850 SATA RAID provides support for RAID 0 (Strip-
ing), RAID 1 (Mirroring), RAID 10 (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 to
two drives. Drives congured for RAID Striping are said
to form a RAID 0 set, while drives congured for RAID
Mirroring are said to form a RAID 1 set. RAID 10 is imple-
mented as a mirrored array whose segments are RAID
0 arrays. RAID 10 has same fault tolerance as mirroring
and reduces overhead by striping. It needs at least four
drives to form a RAID 10. RAID 5 denes techniques for
parity data.
Appendix B
AMD RAID
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