The Logic Off Topic list

Hi all
I Just got a couple new hardrives for my Logic PC DAW, and have 
technical questions that maybe some of you can answer...

1. When formatting the hard drive, I'm asked what size file clusters 
I want.. what is best for a dedicated audio drive? what about the 
OS/programs drive?

2. I'm considering employing my 2 new 40 gb drives in a raid stripe 
configuration for dedicated audio. Will raid 0 be benificial or 
detrimental for audio? 

Thanks in advance for any feedback...
Ed

System: 
Logic 5.2 w/ various vsti's
P4 2.24 ghz
Gigabyte GA-8IHXP mobo
256 rambus 1066 (will be increased when prices drop..)
Echo Mona
Matrox G550
1xIBM 4Ogb for OS/programs
2x maxtor 40gb for audio