See if these will help

http://www.microsoft.com/sql/techinfo/administration/2000/scalabilityfaq.asp

http://www.microsoft.com/sql/techinfo/administration/2000/rosetta.asp

http://www.microsoft.com/technet/prodtechnol/sql/2000/plan/ssmsam.mspx

http://www.microsoft.com/sql/techinfo/administration/2000/scalability.asp

And as RAID 5 has been mentioned above, this is definitely interesting:

http://www.baarf.com/

I would also surf the sites of those hardware vendors. Usually you can find there case studies, that can be useful.