Overview:

Today's computing applications continue to place incredible strain on the host PCI bus and storage subsystem. In an ongoing effort to bring new heights of performance and reliability to today's professional applications, ATTO is pleased to introduce the ATTO ExpressPCI UL4D with PCI-X ... alleviating PCI bus bottlenecks. Leveraging this latest in SCSI storage connectivity, the UL4D delivers up to 640 MB/sec. data throughput - making it twice as fast as currently available SCSI host adapters. The UL4D's blazing fast speed, plus the advantage of the new PCI-X bus interface and improvements in the SCSI standard, enable it to deliver the high bandwidth required in data-intensive environments. 

Benefits

• Ultra320 SCSI performance enables high throughput for servers and high-end workstations

  • Two external channels for aggregate throughput of up to 640 MB/sec.

  • Supports up to 30 SCSI bus IDs

  • Supports Low Voltage Differential (LVD) for cabling up to 12.5 meters per bus

  • Compatible with Single-ended SCSI devices, providing cable distances up to 3 meters

  • Supports all five original requirements of Ultra3 SCSI:

    • Double Transition Clocking

    • Domain Validation

    • Quick Arbitration Select

    • Packetization

    • Cyclical Redundancy Checks

  • Additionally, the UL4D supports Ultra320-specific features such as Free-Running Clock, Read/Write Data Streaming, Flow Control, Training Patterns, Pre-compensation, and Asynchronous Information Protection (AIP)

• Features Advanced Data Streaming (ADS™) Technology for controlled acceleration of data transfers

  • Embedded RISC processor for low-overhead operation

  • Bus Mastering capabilities eliminate CPU processing time as a bottleneck

  • Tagged Command Queuing allows multiple commands to be processed in any order

  • Disconnect/Reconnect eliminates wait time between transfers

• Backward compatible with PCI-based systems, preserving investment in legacy systems

  • 133 MHz PCI-X provides up to 1 GB/second data transfers, allowing full Ultra320 performance

  • Fully backward compatible with 66 MHz and 33 MHz PCI specifications.

  • Fully compatible with 64-bit and 32-bit PCI busses

  • Supports PCI hot swap specifications for high-end servers

• Robust Driver Support

  • Windows^® Server 2003, XP/2000/NT

  • Mac^® OS X

  • Linux

See here for detailed description.