IBM i series Handbook page 81

• 2X Mode : 2 Mbps versus 1 Mbps throughput of the #6050 workstation controller.
• Optimized Mode : The block transfer of data is improved to almost double the
throughput to or from the attached device.
• Dual Mode : Means that two ports are polled simultaneously on the #2722, #2746,
#4746, and #6180 workstation controllers. On older controllers (such as the #6050
workstation controller), only one port out of eight is active at any given time.
The enhancement produces nearly four times the throughput when all of the attached devices
on a port support 5250 Express Data Stream. All of the IBM devices from the original 5251 up
through the 3489 support the Express Data Stream.
Refer to Informational APAR II11804 for additional details regarding workstation
considerations when attached devices or cabling do not support 5250 Express Data Stream.
Additional information on 5250 Express Data Stream is available on the Web at:
http://www.networking.ibm.com/525/
The IBM 7299 twinax-to-fiber multiplexer fully supports all the new functions of the #2720,
#2722, #2746, #4746, and #6180 workstation controllers.
Workload and Performance
Workload and Performance
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