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FabulaTech Forum USB Solutions USB over Network (Moderators: Tim_GaliullinFT, Andrew, Sergey_Jarovski) Data Transfer Speeds for USB 2.0 Hard Drives

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Topic: Data Transfer Speeds for USB 2.0 Hard Drives (Read 5204 times)

pchoi
FabulaTech Forum Newbie

Posts: 2

Data Transfer Speeds for USB 2.0 Hard Drives
on: Apr 22^nd, 2010, 11:00am

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Hi all. I've sent emails to support but they have not responded. I am in the process of evaluating this software for my company. We have a need to transfer data from USB 2.0 hard drives using the USB over Network solution.

I have the client and server both connected via a 1Gbps Ethernet connection. I understand the max theoretical limit of USB 2.0 is 480Mbps. Using this software, I am transferring data at an average sustained rate of about 70Mbps. This is a far cry from the max theoretical 480Mbps. I understand I will never get the max 480Mbps, but I was hoping to get at least half that speed. Transferring a file directly from the server to the client outside of the USB-over-network software (i.e. not from the USB drive) gives me the expected sustained transfer rate, so it is not a networking issue between the server and client.

Does anyone else have a similar experience? Is there something else I need to look at, or is this a limitation of the software?

Thanks in advance!

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Alex_Webster
FabulaTech Forum Senior Member

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Posts: 257

Re: Data Transfer Speeds for USB 2.0 Hard Drives
Reply #1 on: Apr 23^rd, 2010, 1:11am

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Hello Peter,

Sorry for the delayed reply. We have already answered your question, please check your mail-box.

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roby
FabulaTech Forum Newbie

Posts: 4

Re: Data Transfer Speeds for USB 2.0 Hard Drives
Reply #2 on: Apr 23^rd, 2010, 2:33am

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Hello Andrew,

If this limitation is general for every USB hard disk networked with UoN, could you please report here such a detail?

Thank you,
Roby

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roby
FabulaTech Forum Newbie

Posts: 4

Re: Data Transfer Speeds for USB 2.0 Hard Drives
Reply #3 on: Apr 23^rd, 2010, 2:35am

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edit: Alex...

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pchoi
FabulaTech Forum Newbie

Posts: 2

Re: Data Transfer Speeds for USB 2.0 Hard Drives
Reply #4 on: Apr 23^rd, 2010, 11:02am

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Thanks Alex,

I did get your reply in my inbox shortly before you posted here. From your previous email, your response was,

"Dear Peter,

My name is Alex Webster, I'm product manager at FabulaTech.
Thanks for your request.

I need to admit that our product slows the data transfer insignificantly.
I really hope this will not stop you from using it."

Looking at the numbers, it does not seem to be "insignificant". Also your other response was that there is no way to improve the bandwidth. What I would like to know though, is this:

In your internal testing, what kind of speed have you been able to get? What is the max speed anyone can expect to achieve? I'm trying to figure out if the bottleneck is with your software or with something else I may be missing. Are my numbers posted in my first post in line with what you have found in your own internal testing?

Thanks!

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Alex_Webster
FabulaTech Forum Senior Member

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Posts: 257

Re: Data Transfer Speeds for USB 2.0 Hard Drives
Reply #5 on: Apr 27^th, 2010, 7:44am

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on Apr 22^nd, 2010, 11:00am, pchoi wrote:

�I understand the max theoretical limit of USB 2.0 is 480Mbps. �Using this software, I am transferring data at an average sustained rate of about 70Mbps. �This is a far cry from the max theoretical 480Mbps.

Thanks in advance!

This theoretical limit can hardly be achieved using Hard Drives. The speed of data transfer depends also on your PC performance because the data gets copied in the memory.

Anyway we made the following tests:

Test#1

PC: Core2Duo 3Ghz Wolfdale, 4 Gb DDR2, HDD Western Digital My Book essential 1Tb USB 2.0
OS: Windows 7 Ultimate x64

The speed of reading without USB over Network - 37 Mb/s (370 mbps).

The speed of reading using USB over Network (connected to the localhost) - 27 Mb/s (270 Mbps).

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Test#2

PC: AMD Athlon 64 X2 Dual Core 4000+ 2.11 GHz, 4 Gb DDR2, GOOD-Drive USB Flash Drive 8GB
OS: Windows XP 32-bit

The speed of reading without USB over Network - 25 Mb/s (250 mbps).

The speed of reading using USB over Network (connected to the localhost) - 16.1 Mb/s (161 Mbps).
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As you can see the results differ and there is no one unified figure of speed.

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