cyclic redundancy check

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cyclic redundancy check

A computer technician runs a cyclic redundancy check on a hard drive.

Definition
  1. Noun:
    • An error detection code: A "cyclic redundancy check" is a mathematical calculation performed on a block of digital data. The result of this calculation is a short, fixed-size value that is stored or transmitted along with the data.
    • A method for catching errors: Its primary purpose is to detect accidental changes to raw data, such as those caused by noise during storage or transmission. The receiver can perform the same calculation; if the results differ, an error has occurred.
Usage
  • Noun:
    • The file transfer protocol uses a cyclic redundancy check to ensure data integrity.
    • A mismatch in the cyclic redundancy check value indicates the downloaded file is corrupted.
Advanced Usage

  • "To compute/calculate a cyclic redundancy check": To perform the mathematical algorithm on data to generate the check value.

    • The system computes a cyclic redundancy check for each packet before sending it over the network.

  • "CRC value/checksum": The numerical result of the cyclic redundancy check calculation is often called a CRC value or a type of checksum.

    • Compare the cyclic redundancy check values from the source and destination to verify the file.
Variants and Related Words

  • CRC (n): A common abbreviation for "cyclic redundancy check."

    • The software reported a CRC error, so I had to re-download the archive.

  • Checksum (n): A broader term for any small datum derived from a block of data for error detection. A cyclic redundancy check is a specific, powerful type of checksum.

    • While both are used for error detection, a cyclic redundancy check is generally more robust than a simple checksum.
Synonyms
  • Error-detecting code: A general term for codes, including cyclic redundancy check, designed to detect errors in data.
  • Integrity check: A process to verify that data has not been altered.
Related Phrases

  • "To fail a CRC": When the calculated check value does not match the stored/transmitted value, indicating corrupted data.

    • The hard drive sector failed a cyclic redundancy check, so the data could not be read.

  • "CRC error": A common message or alert stating that a cyclic redundancy check has failed.

    • I kept getting a CRC error when trying to install the program from the damaged disk.
cyclic redundancy check

A computer technician runs a cyclic redundancy check on a hard drive.

Noun
  1. an error correction code that is recorded in each sector of a magnetic disk and used to catch errors in the data