On Wed, Sep 30, 2009 at 11:43 AM, Alexandre Pereira
<[log in to unmask]> wrote:
> Hi Forum
>
> I have installed SL-5.3 x86_64 default installation/partitioning scheme in
> my laptop... the only... call it "different" thing that I have done is an
> LVM Luks encryption of my HDD ( It is a laptop, and I carry a lot of sensble
> stuff in it... )  In know it is not "MIL-SPEC hard" as a pkcs #13 protocol (
> Elliptic Curve cryptography over discrete fields ) but man...  I do not
> carry warhead design plans, and sizing calculations with me...   :-)
>
> Anyway...   Trying to dump the content of DVD data, 4.5 Gb of it into my
> desktop took me about 70mn...  THIS IS NUTS...    Trying to do the same in
> another install , unencrypted this time, in another machine ammounted to the
> same...
>
> now, this IS an issue...   this laptop will be used in heavy number
> crunching engineering applications...  meaning disk I/O operations in the GB
> range ( Finite elements meshes, Genetic algorithm operations... massive data
> transfers to put it simply )
>
> Can this be solved... ?
>
> I used (aaarrgghhhh !!! ) Ubuntu with this same lappy and this problem was
> not there....
>

Well you can give a lot more info because there isn't enough to help with:
1) What kind of laptop. What kind of disk drive? What kind of DVD drive
2) What version of Ubuntu did you use (there a ton of different
versions so it will help to figure out what it was )
3) what does iostat or another performance program say
4) Did you get the data from a DVD or network? You reference a desktop
and a laptop.. not sure if you mean 2 differnet types of hardware or
one.

Realize that  IO on laptops is slow. Your standard Laptop drive is
5400 RPM, and the channel to talk through it is usually not even as
fast as commodity desktops.




-- 
Stephen J Smoogen.

Ah, but a man's reach should exceed his grasp. Or what's a heaven for?
-- Robert Browning