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USB Transfer Rate
Name: Matthew (by Mattg) Date: May 14, 2009 at 13:26:22 Pacific OS: Microsoft Windows XP Professional CPU/Ram: 2.792 GHz / 1022 MB Product: Dell / Optiplex gx270 Subcategory: Hard Drives
Comment:
How long should transferring 1Gb on a USB 2.0 Full Speed port take? How much for High- Speed?
Manufacturer: Dell computer corporation Model: Optiplex gx270 OS: Microsoft Windows XP Professional CPU/Ram: 2.793 GHz / 1022 MB Video Card: ATI Radeon 9600 Pro (128mb)
Name: OtheHill Date: May 14, 2009 at 16:16:26 Pacific
Reply:
This sounds like homework but I will answer anyway. USB 2.0 has a theoretical transfer rate of 480Mbits/sec which = 60MBytes/sec. In actual tests you will get far less than that. I just ran a test. 144MB file to a USB 2.0 flash drive. Transfer took 1 minute and 15 seconds. That equates to about 9 minutes for 1GB of data.
Summary: 480Mbs (Mega bits per second) not 480MBs (Mega Bytes per second). To know the transfer rate you have to take 480 Mbs / 8 = 60 MBs. But that is not really true since they are transfer in serial packe...
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