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Disk array device, parity data generating circuit for RAID and Galois field multiplying circuit
Disk array device, parity data generating circuit for RAID and Galois field multiplying circuit
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机译:磁盘阵列设备,用于RAID的奇偶校验数据生成电路和Galois场乘法电路
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摘要
In this parity data generating circuit, a Galois field multiplying calculation is realized by performing data conversion by index table information generated from a Galois field multiplying table so that data for RAID6 are generated. A table check circuit inspects nonconformity of the index table information in advance by using results in which the Galois field multiplying table is indexed from different directions constructed by the longitudinal direction and the transversal direction. Data and parity for making the multiplying calculation are decomposed into plural data and parities by using this table check circuit, and index table information different from each other are allocated to these data and parities. Thus, a longitudinal index table making circuit and a transversal index table making circuit themselves are checked.
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