RAID 5 – BLOCK AND PARITY STRIPING
RAID 5 is similar to RAID 3 as described above except that the parity data is rotated across the physical drives along with the block data. Having the parity data striped across all the physical drives in this manner removes the random write performance bottleneck of RAID 3. The total capacity of a RAID 5 array is calculated the same as a RAID 3 array.
Figure A5. RAID 5 stripes all drives with data and parity information
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