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2-drive SATA to USB or eSATA RAID Sil4723

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Quick Overview

2-drive SATA to USB or eSATA RAID Sil4723


    Host Interface Features
  • One USB 2.0 port at 480 MB/s
  • USB compliance: USB 2.0 specification
  • One eSATA host port at 3Gbps.
  • eSATA compliance: Serial ATA Revision 2.5 * Only one connection is active at a time. When both host ports are connected the USB port will be active.

    Device Interface Features

  • Interface Type: Two SATA Gen2m
  • Speed: 3.0 Gbps
  • Compliance: Serial ATA Revision 2.5 Power Requirements
  • 4-pin floppy style input with on board regulators Physical Specifications


  • Two (2) internal SATA device ports
  • One (1) USB 2.0 host connector
  • One (1) eSATA host connector

    Physical Dimensions:

  • [H] 95.35mm (3.754in), [L] 53.98mm (2.125in)

SteelVine Reference Board

2-drive SATA to USB or eSATA. The PB472304-005 reference board can drop into a variety of standard storage enclosures to effortlessly transform them into an advanced eSATA/USB RAID external storage device. It implements 100% hardware RAID across two SATA hard disk drives with zero software required, and it connects to the host computer through either high speed eSATA or USB 2.0.

The PB472304-005 uses Silicon Image's SiI4723 SteelVine storage processor to "virtualize" the two SATA disk drives, enabling RAID across the drives, and making them look like a single SATA drive to the host controller, allowing even nonport multiplier aware controllers to take advantage of the SiI4723 storage processor's capabilities.

The hardware RAID is controlled via a simple rotary switch on the back panel. Manufacturers can also remove the rotary switch and set the RAID mode via onboard jumpers or using an optional GUI management tool. The external Serial ATA link on the PB472304-005 brings the advantages of Serial ATA - high speed, low cost and reliable data transmission - to a user-friendly and robust external connector, while USB 2.0 ensures compatibility with virtually every computer currently in the market. The PB472304-005 reference board allows manufacturers to get to market quickly with a precertified design built on Silicon Image\'s proven SteelVine Controllers.

Complete mechanical and electrical design files, gerber files, BOM's, schematics, user documentation, drivers, the SteelVine Storage Manager, and the XML API with software are avaliable upon request.

Introducing our latest Port Multiplier feature SiI-4726 a hardware RAID bridge control up to FIVE SATA drives - RAID_PM

Flexible, Fast and Intelligent - That is what our SATA II Port Multiplier (SiI4726 base) offering.

To connect multiple SATA drives to a Single SATA port, and creating RAID array without resource to host CPU now is a reality, thank to the proven SteelVine Storage Processor Architecture from Silicon Image. Our RAID_PM is base on SiI 4726 chip set, which provides a new level of affordable storage for professional users. The RAID_PM provides 3Gb/s SATA performance over the single host SATA link as well as the five device SATA links, and can be configured for internal or external use.

Until now, transfer rates of 3Gb/s and hardware RAID features, were only available to enterprise class applications. RAID PM allows OEMs and system integrator to offer high-end features for price-sensitive professional market applications. Users of the RAID PM can eliminate CPU loading by using the embedded RISC storage processor, which was developed by Silicon Image, and tuned for the needs of storage applications. This storage processor completely frees up the main CPU and provides the enhanced RAID modes.

RAID PM allows up to five SATA drives can be configured reliable data mirroring, data performance striping, or just plain capacity expansion using the friendly GUI provided, RAID PM RAID modes are:

  • Mirroring (RAID 1) allows SATA Hard drives to automatically copy primary hard drive without any CPU loading (typical 1% CPU resource). The our RAID PM provides automatic rebuild on SATA Hard drives replacement and auto-failover, to eliminate any workflow interruptions.
  • Stripping (RAID 0) allows the SATA Hard drives to performance stripe, to provide maximum throughput to the direct attached PC/Server.
  • Spanning allows to make any SATA Hard drives (same or different sizes) appear as one large drive to the host, for extra capacity (also called concatenation).
  • JBOD or Port Multiplier this allows the SATA Hard drives attached PC/Server to see each drive as just a bunch of drives.
  • Striping and Mirroring (RAID 10) allows the device to improve data availability beyond RAID 5 or RAID 6 with large SATA drives, due to rebuild vulnerability.
  • Spanning and Mirroring allows for large capacity with protection. The RAID PM works with any Serial ATA compliant host port, although such as cascade feature (more than 5 drives) JBOD access require a port multiplier aware host controller such as SiI 3124-2 or SiI 3132

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