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The Adaptec AHA-3940UW/OF and AHA-3944UW/OF host adapters deliver superior I/O performance for UltraSPARC systems with PCI. Combining multiple channels and UltraSCSI speed, the AHA-3940UW/OF and AHA-3944UW/OF adapters move data faster to meet the growing demands of workstations and servers and leading-edge applications. In fact, these host adapters transfer data at up to 80 MByte/sec--twice as fast as the highest-performing single-channel UltraSCSI host adapter. With two channels, they accommodate twice as many SCSI peripherals--up to 30 from a single PCI slot.
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Note: Only drivers that are not included or embedded within a supported operating system are listed below. To see a complete list of supported operating systems see the Product Specifications

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Sun Solaris

Hardware Installation
how to install your adaptec pci card (html 74 kb)
Product Documentation
AHA-3940UW/OF and AHA-3944UW/OF (PDF 42 KB)
Use Your Product
scsi terms explained (html 77 kb)
Number of devices
Up to 30 SCSI devices

Bus System Interface Type

32-bit PCI Bus master DMA
External Connectors
Two VHDC 68-pin connectors
Data Transfer Rate
80 MByte/sec

Device Protocol

16-bit UltraSCSI

Advanced Features

  • Multithreaded I/O (up to 255 tasks simultaneously)
  • Scatter/gather
  • Disconnect/reconnect
  • Tagged command queuing
  • Synchronous and asynchronous data transfer

Electrical Connectors

Single-ended, automatic, active, programmable via SCSISelect

Operating Environment

Solaris 2.5.1 and later

Regulatory Compliance

FCC Class B, CE, IEC

Board Dimensions

6.875 inches (17.463 cm) x 4.0 inches (10.16 cm)

Power Consumption

5 V +/- 5% at 2.0 amps maximum

Operating Characteristics

0ºC to 55ºC
10% to 90%, noncondensing humidity

Storage Characteristics

-55ºC to 85ºC

MTBF (mean time between failures, Bellcore)

276,541.7 hours