Asus P4S800D - Manual (Page 77)

ASUS P4S800D motherboard 3-7
3.4 SiS ® RAID configurations
The motherboard includes a high performance IDE RAID controller that adds
reliability to PC desktops or server systems. The SiS 964 southbridge integrated
Serial/Ultra ATA RAID controllers provides a cost-effective hybrid solution. It
supports RAID 0, RAID 1,and JBOD with two independent Serial ATA channels.
RAID 0 (called data striping) optimizes two identical hard disk drives to
read and write data in parallel, interleaved stacks. Two hard disks perform
the same work as a single drive but at a sustained data transfer rate,
double that of a single disk alone, thus improving data access and
storage.
RAID 1 (called data mirroring) copies and maintains an identical image of
data from one drive to a second drive. If one drive fails, the disk array
management software directs all applications to the surviving drive as it
contains a complete copy of the data in the other drive. This RAID
configuration provides data protection and increases fault tolerance to the
entire system.
JBOD (for “Just a Bunch Of Disks” or “Just a Bunch Of Drives”) is officially
termed as “spanning”. This is used to refer to a computer’s hard disk that
haven’t been configured according to the RAID system to increase fault
tolerance and improved data access performance. This RAID system
stores the same data redundantly on multiple drives by combining the
drives into one larger logical drive.
Refer to the SIS 180 Serial ATA User’s Manual found in the motherboard
support CD.