Fujitsu MBA3073RC, MBC2036RC, MBC2073RC, MBA3300RC, MBA3147RC Hashed SAS address code parameter

SAS Interface

1.2.2 Hashed SAS address

SSP frames include a hashed version of the SAS address to provide an additional level of verification of proper frame routing.

The code used for the hashing algorithm is a cyclic binary Bose, Chaudhuri, and Hocquenghem (BCH) (63, 39, 9) codes. Table 1.2 lists the parameters for the code.

Table 1.2 Hashed SAS address code parameter

Parameter	Value
Number of bits per codeword	63
Number of data bits	39
Number of redundant bits	24
Minimum distance of the code	9

The generator polynomial for this code is:

G(x) = (x 6 + x + 1) (x 6 + x 4 + x 2 + x + 1) (x 6 + x 5 + x 2 + x + 1) (x 6 + x 3 + 1)

After multiplication of the factors, the generator polynomial is:

G(x) = x 24 + x 23 + x 22 + x 20 + x 19 + x 17 + x 16 + x 13 + x 10 + x 9 + x 8 + x 6 + x 5

+

x 4 + x 2 + x + 1

30 C141-C013