How can I pin point a USB file transfer bottleneck in Unix?

Posted by HankHendrix on Super User See other posts from Super User or by HankHendrix
Published on 2012-12-11T17:29:03Z Indexed on 2012/12/12 5:07 UTC
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Filed under:

ubuntu

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usb

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Performance

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usb-storage

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data-transfer

I'm experiencing very slow data transfer speeds over USB 2.0 on my nix box and was wondering how I can pin-point the cause of the problem.

I've looked into iotop and top but the cpu and mem figures look normal (compared to guides I have checked).

The box which is affected is Ubuntu 12.04 32bit Server running on an Asus EEE 701 2G model and I am transferring from the OS over USB 2.0 to an external HDD (which transfers at 30MB/s+ on Windows 7 on other machine).

I get rsync write speeds of 1MB/s from OS to USB HDD which seems ridiculously slow. These speeds are consistent with other USB HDDs and sticks.

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