Error installing FC6 x86_64

[Doctor Who]

On 1/3/07, Alan <alan at lxorguk.ukuu.org.uk> wrote:
> > That brings up a question...what *should* it be?  It was set in the
> > BIOS to IDE.  As I understand it, to get the most speed/features out
> > of these drives, it should be set to AHCI, correct?
>
> Correct - AHCI turns on all the features like queued commands that make
> SATA actually any more than PATA with a funny cable.
>
> > Also, I've already done a couple OS installs on these drives, so it
> > would appear changing the setting to AHCI will cause me to reinstall
> > those OS's.
>
> Possibly. Some older OS's (Linux and non Linux) also lack AHCI support
> entirely.
>

So for a desktop machine, is AHCI really desired?  I won't be doing
any hotplugging with the drives, command queing would be more for
servers and might provide slight overhead on a desktop machine...

But from what I have read in this thread, FC6 will not install on my
setup *without* AHCI enabled in the BIOS...why is that?