I've added a fair bit of information on the Opteron HOWTO Wiki at:
for using Fedora Core 3 with X86-64.
In my performance testing, I was finding that with so much RAM, everything
was coming from RAM anyway. RAID10 seemed to be most stable, and writeback
caching increased the speed by about 15% although I don't think I was really
able to max out the IO anyway.
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