Redundant
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In data storage, redundancy refers to additional information stored with the data for reliability purposes. If data is corrupted, the redundant information can be used to repair the error. It can be used with both primary and secondary storage.
Examples:
- LINC tape implements straightforward redundancy by doubling all the tracks on the tape.
- RAM targeted for reliable services has Error-correcting codes.
- RAID can mirror disks or add ECC.
