Apparatus for checking data coherence and method therefor, disk array controller and date storage system

A technology of inspection device and inspection method, which is applied in the direction of memory system, electrical digital data processing, calculation using number system representation, etc., which can solve the problems of reading errors and the inability of the receiving end to know whether the data has errors, etc.
CN1690980AInactive Publication Date: 2005-11-02INFORTREND TECH INC
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
INFORTREND TECH INC
Publication Date
2005-11-02
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

Data coherence checking apparatus, a redundant array of independent disks (RAID) controller and a storage system having the checking apparatus and a method therefor are proposed. The present invention employs an XOR operation unit and an OR operation unit to check the coherence of data to be checked. The XOR operation unit is used to perform XOR operation on the data to be checked. After the XOR operation unit finishes performing the XOR operation on the data of a processing set, it outputs an XOR operation result to the OR operation unit to perform OR operation so as to obtain a check result.
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Description

technical field

[0001] The invention relates to data storage technology, in particular to a storage system with a data consistency check device, a disk array controller, the data consistency check device and its method. Background technique

[0002] In the process of data transmission, data errors are often caused by some external factors, which makes the received data unreliable for the data receiving end. For example, when data is transmitted through an environment such as Ethernet (Ethernet), SATA, iSCSI, etc., data errors are often prone to occur. Therefore, currently there are various error detection methods and / or devices, among which Cycle Redundancy Check (CRC) is the most commonly used data error detection method.

[0003] In some specific occasions, it is possible that the data stream (Data Stream) in transmission already contains inspection data, for example: the data in transmission includes multiple general data (Regular Data or User Data) and multiple parity d...

Claims

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