An Efficient RAID6 System Based on XOR Accelerator
Ruizhen Wu, Yan Jun Wu, Mingming Wang, Wang Lin · 2021
An efficient RAID6 based on Reed-Solomon (RS) codes is proposed in this paper. Both the encoding and decoding can be implemented in same XOR accelerator. With same hardware module different environments only need to change parameters to multiply with the data input. To reduce the complexity of CODEC computation all data is cutting into 8bits each input to suit the Galois Field 8's operation. And to be more efficient the parameter calculation of GF(8) is converted with GF(2) which reduced 2 additions and 1 multiplication, 1 division in Galois Field to only 1 multiplication. Gates cost and IOPS performance are simulated. The proposed RS RAID6 can gain 2-3 times IOPS advantages by the cost of 47% more gates needed.