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RAID 3 explained


RAID 3 is a RAID configuration that uses a parity disk to store the information generated by a RAID controller instead of striping it with the data. Because the parity information is on a separate disk, RAID 3 does not perform well when tasked with numerous small data requests.

Why RAID 3 is not used?

As can be easily seen, RAID 3 is not a good, reliable, or cheap solution. Therefore, as it was mentioned earlier, its use is rare in practice. Systems based on RAID 3 are mainly purposed for implementations where a small number of users refer to the very large files.




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