Adaptec AHA-3940UW/OF Specifications

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PRODUCT HIGHLIGHTS
• Up to 80 MByte/sec Wide
UltraSCSI data transfer rate
across multiple SCSI channels
in a single PCI slot
• Connectivity for up to 30 SCSI
peripheral devices
• Choice of single-ended
(AHA-3940UW/OF) or differential
(AHA-3944UW/OF) adapters
• Compliance with Open Firmware
IEEE 1275 standard
AHA -3940UW/OF and
®
AHA-3944UW/OF
High-performance multichannel UltraSCSI for
UltraSPARC systems with PCI
Overview
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. And
with two channels, they accommodate
twice as many SCSI peripherals—up
to 30 from a single PCI slot.
Key Benefits
Multiple channels transport
more data
The AHA-3940UW/OF and AHA-
3944UW/OF adapters have two
independent UltraSCSI channels.
Each channel is powered by its own
PhaseEngine RISC processor to
®
provide the fastest possible
response times.
Just like doubling the lanes of high-
way, the AHA-3940UW/OF and
AHA-3944UW/OF adapters double
the data-carrying capacity. Across two
UltraSCSI channels, these adapters
deliver up to 80 MByte/sec. The multi-
channel architecture enables slower
peripherals, such as scanners and tape
drives, to be configured on one chan-
nel, ensuring unimpeded throughput
from high-speed peripherals, such as
disk drives and storage subsystems,
using the other channel.
More devices, more kinds of devices
Without sacrificing performance,
the AHA-3940UW/OF and AHA-
3944UW/OF host adapters accommo-
date up to 30 high-performance disk
drives, CD-ROM drives, tape drives,
CD-Recordable drives, scanners and
other SCSI devices. These adapters
protect SCSI peripheral investment,
allowing a mix of SCSI-1, SCSI-2, and
UltraSCSI, as well as 8-bit and 16-bit
devices for configuration flexibility.
The AHA-3944UW/OF adapter
extends configuration flexibility by
accommodating differential connec-
tions up to 25 meters.
Saving a valuable PCI slot
The AHA-3940UW/OF and AHA-
3944UW/OF host adapters support
multiple UltraSCSI channels through
a single PCI slot, freeing a valuable
PCI slot for other uses. Because one
multichannel adapter does the work
of two single-channel adapters, the
cost per channel of growing a system
is reduced.
Unparalleled compatibility,
quality, and reliability
The Adaptec name is your assurance
of high quality as well as high perfor-
mance. Adaptec brings to UltraSPARC
systems its long track record of leader-
ship in SCSI for PCI. The AHA-
3940UW/OF and AHA-3944UW/OF
host adapters adhere to the Open
Firmware IEEE 1275 standard, as well
as to PCI specifications. All Adaptec
host adapters are rigorously tested
with a wide variety of SCSI peripher-
als and systems, making them the
most compatible and reliable host
adapters in the marketplace.