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Safe Harbor Computers - Digital Video & 3D Animation Specialists

Safe Harbor Computers - Digital Video & 3D Animation Specialists

Safe Harbor Computers - Digital Video & 3D Animation Specialists
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ExpressPCI UL4D SCSI Host Adapter
Dual-channel Ultra320-to-PCI-X SCSI Host Adapter for the Ultimate Data-Delivery Performance

List Price: $429.00
Our Price: $379.99

Add ExpressPCI UL4D SCSI Host Adapter to Your Cart to Order Securely Online  • or •  Call 800-544-6599 to Order By Phone

ExpressPCI UL4D SCSI Host Adapter

CATEGORY: Harddrive Controllers PARTNUMBER: ATON5250002
MANUFACTURER: ATTO Technology PLATFORM(S): Apple Mac   &   Windows Win
ON THE WEB: www.attotech.com AVAILABILITY: Usually ships in 2-business days or less.
AVERAGE RATING: Not rated yet!   Write a review! DELIVERY: Packaged

ExpressPCI UL4D SCSI Host Adapter Specifications

The UL4D dual-channel Ultra320 adapter is the latest addition to the ATTO ExpressPCI family of high-performance SCSI host adapters for data-intensive environments. This latest generation adapter boasts data-transfer rates up to 640 MB/sec. and offers support for the advanced PCI-X bus. It is an ideal fit for Enterprise servers and high-end workstations running high volume, mission-critical applications such as messaging and databases.

Features:

  • Ultra320 SCSI
  • Up to 640 MB/sec data-transfer rates
  • Dual independent SCSI channels
  • 64-bit/133 MHz PCI-X with backward compatibility
  • Exclusive ADSTM Technology
  • Supports up to 30 SCSI bus IDs
  • Up to 12 meter cable lengths

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 (ADSTM) 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, 95/98
    • Mac® OS X
    • Linux
Specifications:
  • 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:
      • Supports dynamic bus rescan (OS X)
      • 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
  • 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 for easy field upgrades
    • Plug and play compatible
    • Includes ATTO ExpressPro-ToolsTM and ATTO Configuration Tool formatting and utility software
  • Driver Support:
    • Windows Server 2003
    • Windows XP
    • Windows® 2000
    • Mac® OS X
    • Linux
  • Advanced Data Streaming (ADSTM):
    • Improved PCI system bandwidth use
    • Optimized SCSI-3 algorithms
    • Tagged command queuing
    • Embedded RISC I/O processor
  • Environmental and Physical Characteristics
    • 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

ExpressPCI UL4D SCSI Host Adapter Frequently-Asked Questions

1. HOW DO I TERMINATE A SCSI BUS?

When a SCSI controller issues a command to one of the devices on the SCSI bus, it does not expect to have that command come back to it. Instead, it expects to hear just the response from the drive it issued a command to. Properly terminating the SCSI bus prevents signal reflection on the cables, essentially absorbing commands when they reach the end of the cable. On an improperly terminated SCSI bus, it is common to have the controller software issue error messages caused by unexpected activities on the bus or to experience complete failure of the bus.

The "golden" rule for SCSI termination is that each end of a SCSI bus must be terminated and no terminator can exist anywhere in between these ends. When you add or remove drives from a SCSI bus, you must comply with this rule.

Each SCSI bus starts with a controller. The controller is terminated. Even if there are no drives attached to it, the controller can still issue commands to search for drives without having those commands reflect. Typically, you will add at least one SCSI drive to the bus. You will do so by connecting a ribbon cable from the controller to the drive. Note that one end of the ribbon must plug into the controller and the other end must plug into the drive. In this case, the drive must also be terminated so that both ends of the bus are terminated according to the rule! If you then add additional drives, you can install the drives anywhere along the cable, providing only the drive on the end is terminated.

The termination rule gets complicated when you try to add both internal and external SCSI drives to a system. Since the rule states that the ends of the SCSI bus must be terminated, obviously the drive connected to the end of the internal cable must be terminated and the drive connected to the end of the external cable must be terminated. Unfortunately, this leaves the controller somewhere in the middle of the bus and it too is terminated. If the controller does not provide automatic termination enable/disable, you must manually disable termination on the SCSI controller.

Note that termination violations might sometimes appear to work. However, it is better to be safe than sorry. Follow the rule!

Terminating a drive usually involves installing or removing a jumper on the drive. Check your drive manual for this jumper setting. If the drive does not provide built-in termination, you can purchase a stand-alone terminator. Terminators are available to plug into most SCSI connectors and come in a whole host of shapes and sizes so get the one designed for your application. Note that most new SCSI drives do not provide a built-in terminator and termination is provide by a separate terminator plugged into the end of the SCSI cable.

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What Customers are Saying About Safe Harbor
Shopping with Safe Harbor has probably been one of my best experiences with an online retailer (or any retailer for that matter)! Safe Harbor really seems to care about their customers and I will more than likely be doing a lot of business with them in the future. Safe Harbor is really #1 in my book, way to go! - Roger

Related Resources on Safe Harbor's Website
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ATTO Technology Releases 4th Generation 4-Gigabit Fibre Channel Host AdaptersApril 17

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Order securely online or call 800-544-6599Safe Harbor Computers - Digital Video & 3D Animation Specialists

Safe Harbor Computers - Digital Video & 3D Animation Specialists

Safe Harbor Computers - Digital Video & 3D Animation Specialists