Roy said:
Hi.
I also thought USB 2 was faster than Firewire, until I tried using the
Firewire socket for my scanner.
Specifications can be rather misleading, entirely by accident on the part of
the manufacturer, of course.
Roy G
From:
http://www.cwol.com/firewire/firewire-vs-usb.htm
FireWire vs. USB 2.0
FireWire - Still the Performance King!
Question: USB 2.0 is faster than FireWire...right? Answer: No,
actually FireWire is faster than USB 2.0.
Question: Hold on...USB 2.0 is a 480 Mbps interface and FireWire is a
400 Mbps interface, how can FireWire be faster? Answer: Raw
throughput rating numbers alone don't tell the whole story, as
explained below.
The throughput numbers would lead you to believe that USB 2.0
provides better performance. But, differences in the architecture of
the two interfaces have a huge impact on the actual sustained "real
world" throughput. And for those seeking high-performance, sustained
throughput is what it's all about (reading and writing files to an
external hard drive for example).
Architecture - FireWire vs. USB 2.0
*
FireWire, built from the ground up for speed, uses a "Peer-to-Peer"
architecture in which the peripherals are intelligent and can
negotiate bus conflicts to determine which device can best control a
data transfer
*
USB 2.0 uses a "Master-Slave" architecture in which the computer
handles all arbitration functions and dictates data flow to, from and
between the attached peripherals (adding additional system overhead
and resulting in slower, less-efficient data flow control)
Performance Comparison - FireWire vs. USB 2.0 Read and write tests to
the same IDE hard drive connected using FireWire and then USB 2.0
show:
Read Test:
* 5000 files (300 MB total) FireWire was 33% faster than USB 2.0 *
160 files (650MB total) FireWire was 70% faster than USB 2.0
Write Test:
* 5000 files (300 MB total) FireWire was 16% faster than USB 2.0 *
160 files (650MB total) FireWire was 48% faster than USB 2.0
FireWire - Still the Performance King! As the performance comparison
shown above confirms, FireWire remains the performance leader. And
is the best choice for DV camcorders, digital audio and video
devices, external hard drives, high-performance DVD burners and any
other device that demands continuous high performance throughput.
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