Tony, I was wondering if you could answer a question for me. I'm looking to purchase a small server to host a couple...
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Web sites. I'm not too familiar with hardware and when looking into different servers I noticed some RAID systems say there are separate "controllers" for each hard drive. I understand RAID for the most part, but what does it mean there are separate "controllers?" Just curious and haven't been able to find the answer on the Web. Thanks for any info you may have. The controller is a translator that sits between the hard disks and the computer. There are two reasons to use multiple controllers for a single RAID array: 1) To alleviate a performance bottleneck, or 2) to provide for redundancy in the event of a failed controller. Reason #1 probably doesn't apply to you, unless you're designing an array with more than six drives. So, if you decide that you need every component within the server to be redundant, get the redundant controller too.
I feel like I should warn you -- most people buy far more hardware than they actually need for their site. Your software is about 100 times more likely to fail than your hardware, even if you don't use redundant components. So, be conservative when you consider the costs of adding redundant hardware.
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