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.... What can I do...? BRGDS Alex