• 1-to-5 SATA Port Multiplier
• OS independent
• RAID 0, 1, 10 support
• High performance, reliability and simplicity with hardware RAID 0, 1, and 10 options
• Virtualize multiple storage devices into one or many storage units, e.g. multi-drive partitioning
• Device-to-devices copy to off-load host during rebuild
• Supports ATAPI devices in non-RAID/virtualization mode
• RAID and Virtualization dets configurable with graphical user interface

SPMH4726 provides a new level of affordable storage for professional users. The SPMH4726 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 (eSATA) applications. Until now, transfer rates of 3Gb/s and hardware RAID features, were only available to enterprise class applications.SPMH4726 allows OEMs and system integrators to offer high-end featuresfor price-sensitive professional market applications.

Users of the SPMH4726 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. The device can be configured using the GUI, to provide reliable data mirroring, data performance striping, or just plain capacity expansion.

The SPMH4726 RAID modes are;

1. SAFE or Data Mirroring (RAID 1) X allows device to automatically copy primary hard drive without any CPU loading3. The SPMH4726 provides automatic rebuild on device replacement and auto-failover, to eliminate any workflow
   interruptions.
2. FAST or Data Striping (RAID 0) X allows the device to performance stripe the drives, to provide maximum throughput to the direct attached PC/Server.
3. BIG or Drive Spanning X allows the device to make any two drives (same or
   different sizes) appear as one large drive to the host, for extra capacity (also called concatenation).
4. JBOD or Port Multiplier X this allows the direct attached PC/Server to see each drive as just a bunch of drives.
5. FAST&SAFE or Data Striping and Mirroring (RAID 10) X allows the device to improve data availability beyond RAID 5 or RAID 6 with large SATA drives, due to rebuild vulnerability.
6. BIG&SAFE Drive Spanning and Mirroring X allows for large capacity with protection.

The SPMH4726 works with any Serial ATA compliant host port, although some features such as JBOD access require a port multiplier aware host controller such as SiI3124-2 or SiI3132. For more details, please contact your local Silicon Image sales representative.

• Host Port
  • Supports one SATA host port, 3Gb/s
  • Hot Plug support
  • Supports Async Notification
  • SATA Port Multiplier spec. compliant
  • Supports PM aware hosts and non-PM aware
  • Two detailed system status LEDs
  • eSATA signal level suppport (1m and 2m PHY compliant)
• Device Port
  • Five SATA device ports, 3Gb/s
  • Hot Plug support
  • SATA Port Multiplier spec. complaint
  • Compatible with NCQ drives
  • Two LEDs for detailed status per port
  • eSATA signal level support (1m and 2m PHY compliant)
• Data Protection Features
  • Automatic-Mirroring (RAID 1 mode)
  • Self-healing storage (Auto-Rebuild/Hot Spare)
  • No down time (Automatic-Failover)
  • Less than 1% Host CPU loading during rebuild
  • Fast rebuild of 100GB/hour
  • Easy configuration using GUI applet
  • Drive Performance Aggregation (RAID 0)
• RAID Level Modes
  • FAST/RAID 0
  • SAFE/RAID 1
  • SAFE&FAST/RAID 10 with hot spare
  • SAFE&BIG/Mirrored spanning with spare
  • BIG/Spanning
  • Port Multiplier/JBOD
• System Features
  • Four status LEDs for system functions
  • Works without BIOS updates
  • Max. performance greater than 220MB/s
    (RAID 0)
  • Enclosure Management SEMB (I2C bus)
    support
  • Automatic bad sector remapping
  • OS Agnostic operation
  • Bootable arrays and staggered spin-ups
  • ATAPI device support in PM mode
  • Spread Spectrum Clocking w/SSC clock
  • Event logging from GUI
  • Remote monitoring and management
  • Email notification
  • Manage multiple devices via GUI
  • Field-upgradeable firmware

• SPMH4726-SE: SCSI I 50pin Low Density Centronics Connector Form Factor.(External)
• SPMH4726-SI: SCSI I 50pin Low Density Centronics Connector Form Factor.(Internal)
• SPMH4726-P: Standard PCI Form Factor

• Expansion Storage Bricks
• Disk Shelves
• Storage Enclosures

  It is designed to provide a high performance link between a single SATA2 host port and 5 SATA device ports. With its unique data aggregation and 3Gbps serial link capacity, it support 5 SATA or SATA2 device with auto-negotiation features over one single eSATA connector.

  SPMH4726 is equipped with a "SCSI I 50pin Low Density Centronics Connector" like bracket to be mounted in a standard enclosure to provide the immediate upgrade of your storage system.

• SPMH4726 SATA Port Multiplier
• User's Manual
• siI4726 Manager Software CD