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RAID-3: This type uses striping and dedicates one drive to storing parity information. The embedded error checking (ECC) information is used to detect errors. Data recovery is accomplished by calculating the exclusive OR (XOR) of the information recorded on the other drives. Since an I/O operation addresses all drives at the same time, RAID-3 cannot overlap I/O. For this reason, RAID-3 is best for single-user systems with long record applications.
Need help setting RAID levels? Check out this tip by Rick Cook.
SearchStorage expert and data availability maven Evan Marcus recently started a lively discussion about .Ua6EabwKk5R^2@.ee83ce3/396>RAID 1+0 vs. RAID 0+1 in the Storage Management forum.