2 ATTO ExpressPCI Ultra320 SCSI solutions
The Ultra320 SCSI host adapter represents the seventh generation of SCSI technology, an I/O interface
that is committed to increased performance while maintaining backward compatibility and legacy
support. The ATTO ExpressPCI UL4S is a single channel Ultra320 SCSI, PCI-X host adapter, the ATTO
ExpressPCI UL4D is a dual channel Ultra320 SCSI, PCI-X host adapter, and the ATTO ExpressPCI
UL5D and UL5D LP are dual channel Ultra 320 SCSI PCIExpress (PCIe) host adapters.
Today's computing applications continue to
strain the host PCI bus and storage subsystem. To
bring better performance and reliability to today's
professional applications, the ATTO ExpressPCI
UL4D and UL4S adapters deliver up to 640
MB/sec. data throughput, and take advantage of
the PCI-X bus interface while the ExpressPCI
UL5D delivers data throughput rates of up to 640
MB/sec. using the latest in PCI bus technology,
PCIe. ATTO ExpressPCI UL4D, UL4S, UL5D
and UL5D LP adapters deliver the high
bandwidth demanded in data-intensive
environments such as real-time and high-
definition video editing, web server and database
engines.
To maximize your attached storage, you may
wish to use RAID, a storage system using
multiple disk drives to improve storage
productivity and efficiency. Instead of using the
RAID functionality built into Windows OS, use
the ATTO Express PowerCenter Utility or
ExpressRAID for the most efficient performance.
Contact your ATTO representative for more
information.
Ultra 320 SCSI features
• Double Transition Clocking
• Domain Validation
• Cyclic Redundancy Check (CRC)
• Packetization
• Quick Arbitration Select (QAS)
• Free-Running Clock
• Read and Write Data Streaming
• Flow Control
• Training Pattern
• Pre-Compensation
• Asynchronous Information Protection (AIP)
3
ATTO Technology Inc. ExpressPCI Host Adapter Installation and Operation Manual
Common features
• Supports data transfer speeds of up to 320
MB/sec. per channel
• Supports Ultra320 Specifications including:
• Packetized SCSI
• Double transition clocking
• Quick Arbitration Select (QAS)
• Cyclical Redundancy Checking (CRC)
• Domain Validation (DV)
• Asynchronous Information Protection (AIP)
• Free-running clock
• Flow control
• Advanced Data Streaming (ADS™) provides
controlled acceleration of data transfers.
• Embedded RISC processor for low
overhead
• Bus mastering eliminates CPU processing
time as a bottleneck
• Tagged command queuing allows threads to
be processed efficiently
• Disconnect/reconnect eliminates wait time
between transfers
• Optimized scatter/gather lists
• Backward compatible with legacy SCSI devices
• ASPI (Windows®) compatible
• Automatic and upper-byte termination
• Flash ROM for easy field upgrades
• RAID ready
• Environment and physical specifications
• Operating temperature: 0-45
• Humidity: 10-90% non-condensing
• Airflow: 100 LFM (min.)
• Reliability
• MTBF: 150,000 hours
• MTTR: <15 minutes
UL4D, UL4S specific features
• Accelerated PCI bus management
• PCI Bus Master rate of 1-GB/sec.
• PCI-X 1.0a compliant
• PCI 2.2 compliant
• 64-bit/133 Mhz PCI-X (backward compatible
with standard PCI)
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