On Mon, Nov 30, 2009 at 10:06:59AM +0000, Dr Andrew C Aitchison wrote:
> On Sun, 29 Nov 2009, Konstantin Olchanski wrote:
> 
> >5) your CentOS measurement 375 M/min does not reach even the 100Mbit/sec 
> >network speed limit, perhaps
> >  some other application is "stealing" network or disk bandwidth.
> 
> Maybe.
> Alternatively the CentOS network or disk controller driver does not
> fully support the hardware and is running it in some sort of
> compatiblity mode or with some feature disabled.


Assuming the original poster uses bog-standard hardware,
in my experience, network card either do not work at all or work
at full speed. But maybe you are right and he has some wierd network
card with a semi-experimental driver.

For disks, unless this is some strange USB-attached disk or some
kind of Flash memory device, there are only 2 speeds - "very fast
normal speed", definitely faster than 10 Mbytes/sec (600 Mbytes/min),
or 3 Mbytes/sec (180 Mbytes/min) in IDE PIO (no DMA) "compatibility" mode.


-- 
Konstantin Olchanski
Data Acquisition Systems: The Bytes Must Flow!
Email: olchansk-at-triumf-dot-ca
Snail mail: 4004 Wesbrook Mall, TRIUMF, Vancouver, B.C., V6T 2A3, Canada