Method for updating double-magnetic head user data of large scale fault-tolerant magnetic disk array storage system

• Main Authors: LI MINGQIANG, SHU JIWU
• Format: Patent
• Language: Chinese; English
• Published: 21.01.2009
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

The invention relates to a method for updating double magnetic head user data of a large fault tolerance disc array storage system, which belongs to the fault tolerance disc array storage system technical field. The method is characterized by comprising: in the fault tolerance disc array storage system which is composed of a disc array, a storage adapter, a memory which stores a storage operating system and a processor and is based on an erasure code, firstly, utilizing a read operation to read an old user data block from a disc, using a new user data block to cover the old user data block on the disc, simultaneously, using xor operations to obtain the differential values of the new user data block and the old user data block, then, calculating the renewed differential value of each calibration data block according to product coefficients of each calibration data block about the user data block in the erasure code which is adopted, and finally using compound operations which are in the disc of a double magnet