How many independent parity schemes are utilized for a RAID 6 array?

A.
1

B.
2

C.
4

D.
6

Explanation:
Industry Standard Architecture – Student Guide 1 – Page 262:
RAID 6 performance
RAID 6 employs two independent parity schemes. Two sets of parities must be modified for each
logical write operation, which requires six physical transfers-three reads and three writes.