1 to 5 SATA RAID Port Multiplier

1-to-5 SATA II (3.0Gbps) Port Multiplier
OS independent Hardware RAID
Supports RAID levels: 0 / 1 / 10 / Large (JBOD)
Provides RAID Manager GUI Utility to configure and monitor the status of the disks connected on RAID controller
Supports Hot Spare on RAID
Supports more than 2TB RAID drive
Supports Multiple RAID (Configured as Multiple Volume RAID)
Rebuild speed: 200GB/hour

SPM391 is a One-to-Five SATA Port Multiplier RAID Controller. It is designed to provide SATA port expansion, data protection and performance aggregation in various applications.
SPM391 provides four modes:

PM (Port Multiplier) Mode
RAID 0 Mode
RAID 1 & RAID 10 Mode: RAID 1 (for two disks) and RAID 10 (for four disks).
Large (JBOD) Mode

With an easy configuration scheme, the device can function as a pure port multiplier which provides SATA port expansion just like a SATA Hub, a hard drive performance booster which provides a high-performance device seen by the host controller, or a hard drive data protector which automatically backs up data to prevent data loss from hard drive damage.

SPM391 also has an advanced mode to provide both the benefits of performance boost and data protection.

SPM391 has a self-contained storage processor chip which completely frees up the main CPU loading and whose SATA ports comply with the eSATA specification, making it suitable for use in both internal system and external storage applications.

SATA Features	Supports 6-port 3.0Gbps SATA II interface Supports SATA II Gen2i and Gen2m (External SATA Connection, eSATA) Output swing control and automatic impedance calibration for SATA II PHY Supports asynchronous signal recovery Supports spread spectrum clocking Supports partial / slumber power saving mode Automatic speed negotiation for 3 Gbps or 1.5 Gbps Supports BIST and loopback mode Supports staggered spin-up Supports 48-bit LBA addressing Supports Native Command Queue (NCQ) Supports Hot-Plug Supports Asynchronous Notification Supports PM aware and non-PM aware host
RAID Features	Fully hardware-accelerated RAID Engine No driver, BIOS or software required for RAID operation No external DRAM or processor required for RAID operation Independent of device SATA port connection sequence Supports RAID levels: 0 / 1 / 10 / Large (JBOD) SATA In-band application interface Supports more than 2TB RAID drive Supports on-line command based bad sector recovery Supports on-line Auto-Rebuild Rebuild speed: 200GB/hour Rebuild proceeds continuously between power cycling Supports various RAID configurations and monitoring methods
Compliance	Compliant with Serial ATA II Port Multiplier Spec. Revision 1.1 Compliant with Serial ATA II PHY Electrical Spec. Revision 1.0 Compliant with Serial ATA High Speed Serialized AT Attachment Spec. Revision 2.5
DC Power Connector	Mini 4-pin Floppy Disk Drive like power Connector
>LEDs	Power Status LED RAID Status LED Host Status LED Device Status LEDs (Error, Link&Activity)