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    • 76. 发明授权
    • Disk array device, parity data generating circuit for RAID and Galois field multiplying circuit
    • 磁盘阵列设备,用于RAID和伽罗瓦域乘法电路的奇偶校验数据产生电路
    • US07437658B2
    • 2008-10-14
    • US10989439
    • 2004-11-17
    • Eiji Kobayashi
    • Eiji Kobayashi
    • G06F11/00
    • G06F11/1076G06F2211/1054G06F2211/1057G11B20/1833
    • 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.
    • 在该奇偶校验数据生成电路中,通过由伽罗瓦域乘法表生成的索引表信息进行数据变换,生成用于RAID6的数据,来实现伽罗瓦域乘法运算。 表检查电路通过使用伽罗瓦域乘法表从由纵向和横向构成的不同方向分度的结果,预先检查索引表信息的不一致性。 通过使用该表检查电路,进行乘法运算的数据和奇偶校验被分解为多个数据和奇偶校验,并且将彼此不同的索引表信息分配给这些数据和奇偶校验。 因此,检查纵向索引表制作电路和横向索引表制作电路本身。