Raid 1, Raid 0 or No Raid

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raid 0 helps ONLY if you have to access large files ALL the time.
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Wrong. Raid 0 is a big win for small files as well. With N drives you get a speedup of approximately N with seek dominated workloads, unless your I/O is single threaded.

Martin
 
As I type this (on my Dell Latitude laptop), I'm sitting about ten feet away from my Dell server group. That includes a Poweredge 6300, a 4400, two 2500's, a 6600, and two fully populated drive arrays. And this is my little setup at home. They run various configurations from Raid 0, 1, and 10. This might help you out a bit too:

http://www.prepressure.com/techno/raid.htm

If you'd like to chat about it a bit, PM me. :)
 
I wouldn't do it. Distributing your data over 2 HDDs doubles your risk of losing data. One HDD goes, all your data goes. The read/write speed is an argument but imo it's too risky.
 
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