6.2 not compatible with new sata drives ?!

[Dieter]

> I got 2 new 160GB drives last month, and my system has been
> unstable ever since.  I have swapped cables, purchased a
> brand-new sata150 controller (as opposed to the year old
> sataII), and the results are always the same.

What make & model controllers?  What make & model drives?
Some combinations of controller and drive do not play well
together.