Has anyone configured a database server with RAID-5? Is it really a bad idea to do so? I asked last month for tips on configuring a DB server. I have around $6K to spend. I am pretty much settled on getting 2 quad-core CPUs and 32 Gb of RAM. But I'm still ignorant in terms of what to get for disk. 1500 RPM, I know that. But is it better to do RAID-1 or RAID-5. I can't figure out why RAID-1 would be better than RAID-5. I understand that with RAID-5, a single database write might translate into writing 2 blocks (a data block and a parity block). But doesn't RAID-1 *always* do an extra write for every data block written?
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