What is the minimum number of drives needed to set up a RAID-2 system?
This question is not so easy to answer since there is no clear link between how many error correction code (ECC) disks are needed. And, since
is not really used anymore – today's hard disks provide the same ECC features as RAID2 does as a hardware feature -- I can only answer this from RAID-2 literature.
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The minimum, according to the sources I have, is five data disks and one ECC disk which would make up to six disks.
Anyway, let me repeat that RAID-2 is not really used today and has been used very rarely in the past because of the rise of hardware integrated ECC in modern
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