Phillip,
I've noticed that issue with older AMI MEGARAID controllers. LSI Logic 
bought AMI a while back and in subsequent driver releases support has 
been dropped for the AMI controllers. CentOS/Fedora will load the 
megaraid kernel module but it will not work with the AMI cards.

-Adam

Phillip Crump wrote:
> I have a new (used)Dell Poweredge 1550 server with 2 scsi drives (dual 1ghz
> w/ 2048MB) that I'm attempting to install CentOs 4 onto
> and am having problems getting the darn thing to recognize the hard drives.
> (it's worth noting that it's running RAID 0 and the RAID bios recognizes
> both drives as being in "optimal" state).  I start the
> installation process and all is going well until it autoprobes. All other
> hardware is found
> except for the hard drives. The install subsequently fails because there the
> drives can't be found.
>
> I have been googling my brain out over the last week and this seems to be an
> issue with installing linux
> on this particular server model. (surrounding the megaraid driver and have
> tried many of the
> things out there to no avail.
>
> To see what I have been trying checkout this mailing list entry:
> http://lists.centos.org/pipermail/centos/2005-August/010021.html
>
> Any advice that anyone can give is appreciated!
>
> P.S. I have tried to install Debian, Mandrake and FC6 to no avail.
>
>
> PJ
>
>
>
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