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1.5.4.2
Serial ATA Interfaces
The IXP 450's Serial ATA controller offers four independent Serial ATA ports with a theoretical
maximum transfer rate of 150 MB/s per port. One device can be installed on each port for a
maximum of four Serial ATA devices. A point-to-point interface is used for host to device
connections, unlike Parallel ATA IDE which supports a master/slave configuration and two devices
per channel.
For compatibility, the underlying Serial ATA functionality is transparent to the operating system.
The Serial ATA controller can operate in both legacy and native modes. In legacy mode, standard
IDE I/O and IRQ resources are assigned (IRQ 14 and 15). In Native mode, standard PCI
Conventional bus resource steering is used. Native mode is the preferred mode for configurations
using the Windows* XP and Windows 2000 operating systems.
NOTE
Many Serial ATA drives use new low-voltage power connectors and require adaptors or power
supplies equipped with low-voltage power connectors.
For more information, see:
For information about
The location of the Serial ATA IDE connectors
1.5.4.3
Serial ATA RAID (Optional)
As a manufacturing option, the board's Serial ATA controller supports the following RAID
(Redundant Array of Independent Drives) levels:
•
RAID 0 - data striping. Multiple physical drives can be teamed together to create one logical
drive. As data is written or retrieved from the logical drive, both drives operate in parallel, thus
increasing the throughput. The Serial ATA controller allows for more than two drives to be
used in a RAID 0 configuration.
•
RAID 1 - data mirroring. Multiple physical drives maintain duplicate sets of all data on
separate disk drives. Level 1 provides the highest data reliability because two complete copies
of all information are maintained. The Serial ATA controller allows for two or four drives to
be used in a RAID 1 configuration.
http://www.serialata.org/
Product Description
Refer to
Figure 7, page 44
19
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