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Why use parity?

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First, some background reading. I have been managing hard drive storage for many years now. While my experiences come from years of maintaining data, I am not an IT Professional (though I am an engineer). Start off by reading this article on Storage Spaces War Stories blog, a blog about Microsoft Storage Spaces among other things. The article linked is not specific to Microsoft Storage Spaces, it applies to Network Attached Storage (NAS) in general, including NAS appliances, Unraid servers, etc., or any sort of Redundant Array of Inexpensive Disks (RAID) environment. The idea in question is that of parity or RAID 5 to be… Read More »Why use parity?