![]() ![]() Rather, double parity calculates the extra parity against a different group of blocks. Differently, the second set is not another set of points in the over-defined polynomial which characterizes the data. Now part of RAID 6, double parity (sometimes known as row diagonal parity) features two sets of parity checks, like traditional RAID 6. Additionally, there are non-RAID drive architectures, providing configurations of multiple hard drives not referred to by RAID acronyms. Although all RAID implementations differ from the specification to some extent, some companies and open-source projects have developed non-standard RAID implementations that differ substantially from the standard.
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