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[SOLVED] USB2.0 flash memory - transfer speed.

 
 
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      Feb 23rd, 05, 1:21 PM
I've just purchased a USB2 memory stick.

How do I know I'm obtaining the faster transfer rates of USB2 when I'm
copying files - is there a way of checking easily.

TIA.


 
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Alex Fraser
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      Feb 23rd, 05, 1:31 PM
" " <> wrote in message
news:cvhsi5$ok1$...
> I've just purchased a USB2 memory stick.
>
> How do I know I'm obtaining the faster transfer rates of USB2 when I'm
> copying files - is there a way of checking easily.


The obvious is good enough... copy a known amount of data from the device to
your HDD (not the other way around), and time how long it takes. Divide the
amount of data by the time, and if it's more than 1.5MB/s it must be High
Speed (actually, if it's more than 1MB/s it's probably High Speed).

Alex


 
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Alan Gauton
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      Feb 23rd, 05, 1:49 PM
In article <cvhsi5$ok1$>,
says...
> I've just purchased a USB2 memory stick.
>
> How do I know I'm obtaining the faster transfer rates of USB2 when I'm
> copying files - is there a way of checking easily.


Depends - on Windows XP it'll flag up a message if it's plugged into a
USB 1.1 port, at least XP SP2 does anyway.

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      Feb 23rd, 05, 3:54 PM

"Alan Gauton" <agauton-> wrote in message
news:. uk...
> In article <cvhsi5$ok1$>,
> says...
>> I've just purchased a USB2 memory stick.
>>
>> How do I know I'm obtaining the faster transfer rates of USB2 when I'm
>> copying files - is there a way of checking easily.

>
> Depends - on Windows XP it'll flag up a message if it's plugged into a
> USB 1.1 port, at least XP SP2 does anyway.
>
> --
> AG
>
> Remove removes from address to remove anti-spam measures.
> -----------------------------------------------------------------------
> Alan Gauton E-Mail agauton @ postmaster.co.uk
>
> Never for me the lowered banner, never the last endeavour!
> (Damon Hill - 16th June 1999)


I'm getting the messages mentioned above when it's plugged into a USB1.1
port but not when it's plugged into a USB2 port so at least that seems
correct.

To transfer a folder of 20mb takes about 10 seconds via the USB2 port and 26
seconds when plugged in via the USB1.1 port. The difference is not quite as
much as I had expected but it is definately quicker via USB2 as I had hoped.



 
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Alan Gauton
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      Feb 23rd, 05, 4:34 PM
In article <cvi5gu$rd1$>,
says...
>
> "Alan Gauton" <agauton-> wrote in message
> news:. uk...
> > In article <cvhsi5$ok1$>,
> > says...
> >> I've just purchased a USB2 memory stick.
> >>
> >> How do I know I'm obtaining the faster transfer rates of USB2 when I'm
> >> copying files - is there a way of checking easily.

> >
> > Depends - on Windows XP it'll flag up a message if it's plugged into a
> > USB 1.1 port, at least XP SP2 does anyway.
> >

>
> I'm getting the messages mentioned above when it's plugged into a USB1.1
> port but not when it's plugged into a USB2 port so at least that seems
> correct.
>
> To transfer a folder of 20mb takes about 10 seconds via the USB2 port and 26
> seconds when plugged in via the USB1.1 port. The difference is not quite as
> much as I had expected but it is definately quicker via USB2 as I had hoped.


Iirc, the throughput is supposed to be about 40 times faster - having
said that, you still have the internal hardware transfer, and the OS
start and stop of the transfer. I suspect if you tried a larger file the
differences would be more marked.

--
AG

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