S-1U2SR is a 1 USB2.0 host to 2 drive intelligent SATA II storage processor that allows users to easily deploy and manage reliable, affordable storage devices that connect to the fast, serial, hot plugable, SATA I and SATA II host ports found in PCs, consumer devices and servers. System designers can take advantage of the S-1U2SR hardware RAID features to build high performance, reliable storage solutions that offer OS transparency thereby greatly simplifying product development as well as the user experience. The S-1U2SR modes are; Data Mirroring (RAID 1) -allows device to automatically copy primary hard drive without any CPU loading. The SiI4723provides automatic rebuild on device replacement and auto-fail over, to eliminate any workflow interruptions. * Data Striping (RAID 0)-allows the device to performance stripe the drives to provide maximum throughput to the direct attached PC (RAID 0). * Drive Spanning-allows the device to make my two drives (same or different sizes) appear as one large drive to the host for extra capacity (Concatenation). * Port Multiplier or JBOD - this allows the direct attached PC to see each drive as just a bunch of drives. Systems with pod multiplier aware hosts may take additional advantage of the S-1U2SR virtualization capabilities to segment hard drive capacity into multiple storage partitions, each appearing to the host as a different target device. Based on how the S-1U2SR is configured, these partitions can have different performance or reliability properties to suit the application (s). This functionality and versatility allows storage system vendors to implement cost effective SATA storage solutions with RAID and virtualization capability that improve system performance and reliability, simplify storage administration and lower overall system cost. S-1U2SR is designed for optimum power, performance and price .It is based on the Silicon Images industry leading SATA Link technology. It leverages much of the circuit innovation at the physical layer of Silicon Image\'s proprietary reduced-overhead Multi-layer Serial Link (MSL) architecture, which was pioneered and proven with our market-leading Panel Link? Products. Applications * Expansion Storage Bricks * Disk Shelves * Storage Enclosures * Backup Systems * Embedded Backup Applications * Video Editing Systems * Near Line DAS Storage * Internal Auto-Protection Upgrade * External Storage Enclosures * eSATA Storage Target/Host * Medical Protected Storage * Industrial Protected Storage * SOHO / SMB Protected Storage Dimension : 83 *56 *20 mm Weight : 42 g Overall Features * 1 USB2.0 to2 Intelligent, native SATA II storage processor * OS independent, Driverless, Auto Configuration * RAID 0,1 support * Embedded fast Steel Vine Storage Processor * Virtualization engine to simplify and improve utilization of storage devices * Industry leading SATA Link? Technology and eSATA technology * Tunnel Mode for HDD firmware download * Smart Command Support Intelligent Storage processor Features? * Automatic Fail over in RAID 1 mode * Automatic Rebuild m RAID1 mode? * Automatic RAID mode configuration * 100GB/hr Rebuild speed without Host CPU loading * High performance, reliability and simplicity with hardware RAID 0,1 options * Virtualized multiple storage devices into one or many storage units, e.g. multi-drive drive spanning, drive partitioning or act as a JBOD port multiplier * High-speed, native SATA II connection to host and device * Device-to-device(s) copy to off-load host during rebuild * LED drivers for status reporting * Supports ATAPI devices m non-RAID / virtualization mode * RAID and Virtualization sets configurable with graphical user interface * Drive Splitting for multi-RAID partitions on a single volume with PM Aware Host * GUI-less operation supported * Drive Failure Alarm signal * Configuration pins to set RAID modes * LED pins to show current state and highlight state changes SATA Features * Compliant to SATA 1.0a specification, and the following SATA II specifications: Extensions to SATA1.0a, Phy specification; Cable and Connectors Volume 1and 2:and Port Multiplier Specification. * 1x2 Port Multiplier Functionality or JBOD mode * 1.5Gpbs or 3Gpbs link rate with auto-negotiation * Supports hot plug, drive roaming and hot spare roaming * SATA Enclosure Management Bridge (SEMB) support with I2C interface to external Storage Enclosure Processor (SEP) * Independently programmable PHY settings to support extended PCB trace lengths and external SATA II applications * Supports host control of hard disk drive staggered spin-up * Far end Retimed loop-back BIST for host initiated system testing * Compatible with NCQ drives * Greater than 110MBps sustained reads in RAID 1 mode (limited by drives)
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