parity bit

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parity bit

n. Computers
A bit added to a binary code that indicates parity and is used to check the integrity of data.
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Noun1.parity bit - (computer science) a bit that is used in an error detection procedure in which a 0 or 1 is added to each group of bits so that it will have either an odd number of 1's or an even number of 1's; e.g., if the parity is odd then any group of bits that arrives with an even number of 1's must contain an error
computer science, computing - the branch of engineering science that studies (with the aid of computers) computable processes and structures
bit - a unit of measurement of information (from binary + digit); the amount of information in a system having two equiprobable states; "there are 8 bits in a byte"
References in periodicals archive ?
In RAID 5, data is cut into fixed-size strips and separately stored in the hard disks in turn; meanwhile, a parity block will be created in each horizontal stripe or block and is designed to protect other data blocks in horizontal blocks, but can only handle single data block damage.
There are four constraint groups, and each block contains two symbols; thus, there are four parity blocks. Fig.
Different from triplication, HDFS-RAID divides a file into stripes consisting of several blocks and generates the corresponding parity blocks, which can not only save storage space more significantly, but also provide reliability for protection against data corruption.
RS(255,247) encoder then creates a 8- byte parity blocks at the end.
Similar to initialization, the process of rebuilding requires that each data block on the system is read and the XOR computations are performed in order to obtain the absent data and parity blocks, which are then written onto the new disk.