operation of file copy is very slow

Mario Vukelic mario.vukelic at dantian.org
Mon Sep 24 19:59:57 UTC 2007

On Mon, 2007-09-24 at 12:12 -0700, hong zhang wrote:
> List,
> Copy operation is very slow on my Ubuntu laptop. It
> takes 13 mins to copy 574M bytes file from usb flash
> card to my hard disk. But copy is pretty fast when I
> use fedora 5 on my laptop.

Can you test with another USB device, for example with a hard drive,
whether all copies over USB (regardless which type of device) are slower
on Ubuntu? The transfer rate you see is not too far from the specified
data rates of USB 1.0 [1.5 Mbit/s (Low-Speed) and 12 Mbit/s
(Full-Speed)]. It is possible that your USB device is not correctly
recognized as a 2.0 device. 

What is the output of lsusb in the terminal, and which version of Ubuntu
do you use?

> I think I do not partiotion smartly when I install
> ubuntu. I partition two parts. One 2 GB bytes for swap
> and 38 GB for root. But it seems not work smartly.

The partitioning is ok. 2 GB for swap are fine, and one partition for
root is ok too (splitting it up has some advantages and some
disadvantages). In any case, it has nothing to do with the USB problem.

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