Paritetsdata

Paritetsdata is a term used in some languages to refer to parity information that relates to other data for the purpose of detecting or correcting errors. In practice, it appears in two broad areas: error detection and data availability or recovery. In error detection, parity data often consists of parity bits appended to a data stream, typically forming even or odd parity. Such parity allows the detection of single-bit errors that occur during transmission or storage.

In data storage and RAID systems, parity data is an additional set of bits computed from data blocks to enable reconstruction of lost data if a drive fails. For example, in RAID 5 parity information is distributed across drives, while RAID 6 uses two independent parity schemes to tolerate multiple failures. Parity data in these contexts supports data integrity and availability without requiring full data duplication.

In coding theory, parity is enforced through parity-check equations, which define a parity-check matrix. These constraints underpin error-correcting codes such as Hamming, BCH, and LDPC codes. During decoding, parity checks help locate and correct errors in the received data.

Paritetsdata is not a substitute for encryption or authentication; it is primarily a mechanism for detecting and recovering from errors rather than protecting confidentiality. The term paritetsdata is not universally standard in English, and in many contexts the more common terms parity data or parity information are used.

See also: parity bit, parity-check matrix, RAID, error-detecting codes, error-correcting codes.