Features

• 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)

SCSI Interface

• 320 MB/sec. per channel data-transfer rates
  
• Two (2) external VHDCI and two (2) internal high-density connectors per channel
  
• Low Voltage Differential (LVD) signaling
  
• Support for tagged command queuing
  
• Backward compatible with Ultra 160, Ultra2, Ultra/WIDE, Fast/WIDE and
• Narrow SCSI devices

Advanced SCSI

• Double transition clocking
  
• Domain validation
  
• Cyclical Redundancy Checking (CRC)
  
• Packetization
  
• Quick Arbirtration Select (QAS)
  
• ASPI compliant (for PC users)
  
• Bootable from attached disks
  
• Support for disconnect/reconnect
  
• Support for multiple block sizes

Advanced Data Streaming (ADS)

• Improved PCI system bandwidth use
  
• Optimized SCSI-3 algorithms
  
• Tagged command queuing
  
• Embedded RISC I/O processor

Accelerated PCI Bus Management

• PCI-X bus master rate of 1 GB/sec.
  
• PCI-X 1.0a compliant
  
• PCI 2.2 and PCI 99 compliant
  
• 64-bit/133 MHz PCI-X (backward compatible with standard PCI)
  
• General Characteristics:
  
  • Automatic termination
    
  • Upper-byte termination for Narrow devices
    
  • Flash ROM BIOS for easy field upgrades
    
  • PC 99 compliant
    
  • Plug and play compatible
    
  • Includes ATTO ExpressPro-Tools™ and ATTO Configuration Tool formatting

Dimensions:

• Length 6.521"
  
• Height 4.450"

Operating Environment:

• Temperature: 0-45º C
  
• Humidity: 10-90% non-condensing
  
• Airflow: 100 LFM (min)

Reliability:

• MTBF = 150,000 hours
  
• MTTR < 15 Minutes

Power:

• 0.75 typical/2.0 max. Amps @ + 5.0 VDC
  
• 0.05 Amps @ + 12.0 VDC

PCI Signal Compatibility:

• 3.3 Volts/5 Volts universal

OS Compability

• Windows Server 2003
  
• Windows XP
  
• Windows® 2000 /NT
  
• Mac® OS X
  
• Linux