Detecting low-level data corruption

Details Detecting low-level data corruption Detecting low-level data corruption

2006-03-28

2006-03-28

Bonzo, Bryce P. (Department: 2114)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

Reexamination Certificate

active

07020798

ABSTRACT:
Checksum values are used to detect low-level data corruption. I/O operations, such as, for example, read operations and write operations, cause data blocks to pass through a number of low-level drivers when the data blocks are transferred between an operating system and mass storage location. A checksum filter driver intercepts a data block as the data block passes between low-level drivers as a result of the performance of an I/O operation. The checksum filter driver calculates a first checksum value for the data block. The checksum filter subsequently intercepts the data block as the data block passes between low-level drivers as a result of the performance of a subsequent I/O operation. The checksum filter driver calculates a second checksum value for the data block. The first checksum value and the second checksum value are compared. Data corruption is detected when a checksum mismatch occurs.

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Barbara, Daniel; Goel, Rajni; and Jajodia, Sushil; “Using Checksums to Detect Data Corrpution”; Advances in Database Technology—EDBT 2000. 7th International Conference on Extending Database Technology. Proceedings (Lecture Notes in Computer Science vol. 1777), pp. 136-149.
Jackson, Dr. Keith; “Checksum Methods Used to Detect Virus Attacks”; Virus Bulletin, pp. 7-8.

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